For the record, here is the wiki content from the previous thread, as of 31 December 2016.
Shorthaul
ALC- ALC-LGW: ET to CE, ALC, 120 (5/2014)
- LGW-ALC: ET to CE, LGW, £85 (5/2014)
AMS- LGW-AMS: ET to CE, LGW, £75 (5/2014)
- AMS-LHR: ET to CE, LGW, £109 (9/2016)
ARN- ARN-LHR: ET to CE, ARN, 1400 SEK (?)
ATH- ATH-LHR: ET (discounted) to CE, 160 (5/2014)
BCN- BCN-LHR: ET to CE, BCN, 120 (3/2014), 140 (1/2015)
CPH- CPH-LHR: ET to CE, CPH, 900 DKK (5/2014)
DUB- DUB-LHR ET to CE, DUB, 100 (4/2015)
DUS- DUS-LHR ET to CE, DUS, 145 (3/2016)
FDH- LGW-FDH: ET to CE, LGW, £99 (1/2015)
FRA- FRA-LHR: ET to CE, FRA, 135 (7/2015)
HEL- HEL-LHR: ET to CE, HEL, 155 / HBO 190 (10/2016)
- LHR-HEL: 160£ HBO (10/2016)
IST- IST-LHR: ET to CE, IST, US$210 (9/2016)
LIN- LHR-LIN: ET to CE, LHR, £199 (8/2106)
LIS- LIS-LHR: ET to CE, LIS, 135 (6/2014)
LUX- LUX-LHR: ET to CE, LUX, 100 (6/2014)
LCA- LCA-LGW: ET to CE, LCA, 150 (8/2014)
MAD- MAD-LHR: ET to CE, MAD, 135 (3/2014)
MLA- LGW-MLA: ET to CE, LGW, £105 (4/2014)
- MLA-LGW: ET to CE, MLA, 119 (1/2016)
OSL- OSL-LHR: ET to CE, JAN, 1175 NOK (~£93) (1/2016)
- OSL-LHR: ET to CE, AUG, NOK1,775 (08/2016)
OTP- OTP-LHR: ET to CE, OCT, 120 (11/2014)
PRG- PRG-LHR: ET to CE, FEB, 3000 Crowns (~£90) (2/2016)
RAK- RAK-LGW: ET to CE, RAK, 1800MAD (±£130) (12/2013)
- RAK-LGW: ET to CE, RAK, 1700MAD (±£130) (4/2016)
SKG- LGW-SKG: ET to CE, LGW, £125 (8/2016)
- SKG-LGW: ET to CE, SKG, 150 (7/2014)
TFS- LGW-TFS: ET to CE, LGW, £125 (11/2014)
VCE- VCE-LGW: ET to CE, VCE, 102 (4/2014)
- LGW-VCE: ET to CE, LGW, ?
- VCE-LHR: ET to CE, VCE, 205 (5/2016) ("more expensive than Gatwick"check-in agent)
WAW- WAW-LHR: ET to CE, WAW, 550 PLN (~£95) (9/2015)
Longhaul
ACC- LHR-ACC: WT to WTP, LHR, £209 (3/2014)
AMM- LHR-AMM: WT to CW, LHR, £329 (?)
- AMM-LHR: WT to CW, AMM, £329 (?)
ACC- AUH-LHR: CW to F, AUH, 6,000AED (?)
ATL- ATL-LHR: WT to WTP, ATL, 330 USD (Feb 17 2016)
AUS- AUS-LHR: WTP to CW, AUS, 850 USD (Nov 12th & May 24th 2014)
- AUS-LHR: WTP to CW, AUS, 900 USD (Feb 2015)
- AUS-LHR: WT to WTP, 355 USD (Dec 2014)
BAH- LHR-BAH: WT to WTP, £115 (Nov 2016)
BEY- BEY-LHR: WT to CW, BEY, $625 (10/2014)
BKK- BKK-LHR: WTP to CW, BKK, £700 (4/2014)
- BKK-LHR: WT to WTP, BKK, 13000THB (11/2014)
- BKK-LHR: WT to CW, BKK, 49000THB (11/2014)
- LHR-BKK: WTP to CW, LHR, £599 (9/2014)
BLR- BLR-LHR: WTP to CW, BLR, $650 (5/2014)
BOM- BOM-LHR: CW to F, LHR, 38,000 rupees/£399 (4/2014)
- BOM-LHR: WT to WTP, LHR, 15,015 INR/~£178 (10/2016)
BOS- LHR-BOS: CW to F, LHR, £599 (4/2014)
- BOS-LHR: WT to WTP, $320 (12/2014)
- BOS-LHR: WTP to CW, $850 (1/2015)
- BOS-LHR: CW to F, BOS, $900 (4/2014)
CAI- CAI-LHR: WTP(?) to CW, CAI, 5,000 EGP (4/2014)
- CAI-LHR: WTP to CW, CAI, £699 (4/2014)
- LHR-CAI: WT to WTP, CAI, £209 (5/2014)
- CAI-LHR: WT to WTP, CAI, 1,800EGP ~£149 (5/2014)
CPT- CPT-LHR: CW to F, CPT, 10,000 ZAR (4/2014)
DEL- DEL-LHR: CW to F, DEL, 38,000 rupees/£399 (5/2014)
- DEL-LHR: WT+ to CW, DEL, 38,000 rupees/£399 (8/2014)
DEN- LHR-DEN: WT to WTP, LHR, £209 (8/2014)
- LHR-DEN: WT to CW, LHR, £749 (8/2014)
- LHR-DEN: WTP to CW, DXB, £599 (8/2014)
DFW- DFW-LHR: WT+ to CW, DFW, 800 USD (?)
- DFW-LHR: CW to F, DFW, 850 USD (09/2015)
- LHR-DFW: CW to F, GLA, £599, (12/2014)
- DFW-LHR: CW to F, DFW, 850 USD (04/2016)
DXB- LHR-DXB: WT to WTP, ORY, 230 (2/2014)
- LHR-DXB: WTP to CW, LHR, £599 (5/2014)
- LHR-DXB: CW to F, LHR, £599 (5/2014)
- DXB-LHR: WTP to CW, DXB, 3000 AED (5/2014)
- DXB-LHR: CW to F, DXB, 3000 AED (5/2014)
EWR- LHR-EWR: WTP to CW, LHR, £649, (10/2015)
GIG- GIG-LHR: CW to F, GIG, $850 USD (04/2015)
- GIG-LHR: WTP to CW, GIG, $850 USD (06/2015)
HKG- LHR-HKG: WT to WTP, LHR, £209 (2/2014)
- LHR-HKG: WTP to CW, LHR, £499 (2/2014)
- HKG-LHR: WT to WTP, HKG, 3000HKD (1/2016)
- HKG-LHR: WT to CW, HKG, 12000HKD (1/2016)
- HKG-LHR: WTP to CW, HKG, £599 (10/2014)
- HKG-LHR: CW to F, HKG, 13000HKD (6/2014)
- LHR-HKG: WT to WTP, LHR, £349 (10/2016)
- HKG-LHR: WT to WTP, HKG, 3000HKD (10/2016)
- HKG-LHR: WT to CW, HKG, 12000HKD (10/2016)
- HKG-LHR: WTP to CW, HKG, WT-F 18000HKD (10/2016)
- LHR-HKG: WT to CW, LHR, £779£ (10/2016)
HYD- HYD-LHR: WT to WTP, HYD, 16000INR/~$261 (10/2014)
- HYD-LHR: WT to CW, HYD, 61000INR/~$995 (10/2014)
- HYD-LHR: WT to WTP, HYD, 15015INR/~$236 (5/2015)
ICN- ICN-LHR: WT to WTP, ICN, 176,000 KRW / GBP 103 (March 2014)
- ICN-LHR: WT to CW, ICN, 1,357,600 KRW / GBP 796 (March 2014)
- ICN-LHR: WTP to CW, ICN, 1,340,000 KRW / GBP785 (March 2014)
- ICN-LHR: CW to F, ICN, 908,000 KRW / GBP 532 (March 2014)
JFK- LHR-JFK: WT to WTP, JFK, £220 (Nov 2014)
- LHR-JFK: WTP to CW, LHR, £649 (Jan 2016)
- LHR-JFK: CW to F, LHR, £599 (Dec 2014)
- JFK-LHR: WT to WTP, JFK, $309 (April 2014)
- JFK-LHR: WT to CW, JFK, $1050 (April 2014)
- JFK-LHR: WT to CW, JFK, $1100 (Nov 2015)
- JFK-LHR: WTP to CW, JFK, $850 (May 2014)
- JFK-LHR: WTP to CW, JFK, $950 (Jan 2016)
- JFK-LHR: CW to F, JFK, $990 (Dec 2015)
- JFK-ORY: WT to CW, JFK, $1150 (OpenSkies - Oct? 2014)
- JFK-ORY: WT to CW, JFK, $820 (OpenSkies - Nov 2014)
JNB- LHR-JNB: WT to WTP, LHR, £209 (3/2014)
- LHR-JNB: WT to WTP, LHR, £209 (5/2014)
- LHR-JNB: WT to CW, LHR, £749 (5/2014)
- LHR-JNB: WTP to CW, LHR, £649 (1/2016)
- LHR-JNB: CW to F, LHR, £649 (12/2015)
- LHR-JNB: WT to WTP, LHR, £229 (Feb 2016)
- LHR-JNB: WT to CW, LHR, £799 (Feb 2016)
- JNB-LHR: WT to WTP, JNB, 9999 ZAR (9/2014)
- JNB-LHR: WTP to CW, JNB, 9,999 ZAR ($619) (Feb 2016)
- JNB-LHR: WT to WTP, JNB, 3,750 ZAR ($240) (Feb 2016)
- JNB-LHR: WT to CW, JNB, 13,749 ZAR ($859) (Feb 2016)
KIN- KIN-LGW: WTP to CW, KIN, $800 USD (May 2016)
LAS- LHR-LAS: WT to WTP, LHR, £209 (June 2014)
- LHR-LAS: WT to CW, LHR, £749 (June 2014)
- LHR-LAS: WTP to CW, LHR, £649 (September 2015)
- LHR-LAS: CW to F, LHR, £599 (June 2014)
- LAS-LHR: CW to F, LAS, $1050 (September 2016)
- LAS-LHR: WT to WTP, LAS, $216 (January 2017)
LAX- LHR-LAX: WT to WTP, LHR, £209 (March 2014)
- LHR-LAX: WT to WTP, LHR, £229 (Sept 2014)
- LAX-LHR: WTP to CW, LAX, $950 (Jan 2015)
- LAX-LHR: WTP to CW, LAX, $900 (3/2014) [mjrkong]
- LAX-LHR: WT to CW, LAX, $1050 (?)
- LAX-LHR: WT to WTP, LAX $355 (Dec 2014)
LOS- LOS-LHR: CW to F, LOS, 1,299 USD (August 2016)
MAA- MAA-LHR: WTP to CW, MAA, £381 (November 2015)
MCO- MCO-LGW: WT to WT+, MCO, $350 (January 2016)
- MCO-LGW: WT to CW, MCO, $1,600 (January 2016)
- MCO-LGW: WTP to CW, MCO, $850 (January 2016)
MEX- MEX-LHR: CW to F, MEX, £700 (October 2014)
MIA- LHR-MIA: WT to WTP, LHR, £269? (Jan 2016)
- LHR-MIA: WT to CW, LHR, £699? (Jan 2016)
- LHR-MIA: CW to F, LHR T3 transfer desk, £649 (Feb 2016)
- MIA-LHR: WT to WTP, MEX lounge, $435 (Sept 2014)
- MIA-LHR: WTP to CW, MIA lounge, $900 (Sept 2014)
- MIA-LHR: WT to CW, MIA lounge, $1250 (Sept 2014)
- MIA-LHR: CW to F, MIA lounge, $1100 (Sept 2014)
ORD- ORD-LHR: WT to WTP, ORD, 300 USD (April 2014)
- ORD-LHR: WT to CW, ORD, 900 USD (April 2014)
- ORD-LHR: WTP to CW, ORD, 825 USD (Jan 2016)
- LHR-ORD: WT to WTP, LHR, £259 (Nov 2016)
NRT- LHR-NRT: CW to F, LHR, £599 (3/2014)
PHL- LHR-PHL: WT to WTP, LHR, £200 (April 2014)
- PHL-LHR: WT to WTP, PHL, $300 (April 2014)
PHX- PHX-LHR: WTP to CW, PHX, $850 (Dec 2014)
- LHR-PHX: CW to F, DUB, 899 (Nov 2015)
- PHX-LHR: WTP to CW, PHX, $850 (Feb 2016)
- PHX-LHR: WT to CW, PHX, $999 (Feb 2016)
- LHR-PHX: WT to CW, LHR, GBP 799 (Mar 2016)
- LHR-PHX: WTP to CW, LHR, GBP 649 (Mar 2016)
- LHR-PHX: CW to F, LHR, GBP 649 (Mar 2016)
RUH- RUH-LHR: WT to CW, RUH, 3000 SAR (10/2014)
- RUH-LHR: WTP to CW, RUH, 2000 SAR (10/2014)
- RUH-LHR: CW to F, RUH, 3000 SAR (10/2014)
- LHR-RUH: WTP to CW, LHR, GBP 599 (12/2014)
SAN- SAN-LHR: WT to WTP, SAN, 355 USD (11/2015)
- SAN-LHR: WTP to CW, SAN, 950 USD (5/2016)
SEA- SEA-LHR: WT to CW, SEA, 1090 USD (Feb 2015)
- SEA-LHR: WT to WTP, SEA, 355 USD (Feb 2015)
- SEA-LHR: WTP to CW, SEA, 850 USD (June 2014)
- SEA-LHR: CW to F, SEA, 950 USD (Jan 2016)
- SEA-LHR: CW to F, SEA, 979 USD (Oct 2016)
- LHR-SEA: WT to CW, LHR, GBP 799 (March 2015)
- LHR-SEA: WT to WTP, LHR, GBP 229 (April 2015)
- LHR-SEA: WT to WTP, LHR, GBP 229 (May 2015)
- LHR-SEA: WT to WTP, LHR, GBP 229 (Jan 2016)
SFO- LHR-SFO: WTP to CW, SFO, £599 (3/2014)
- LHR-SFO: WTP to CW, SFO, £599 (1/2016)
- SFO-LHR: WT to CW, SFO, 1050 USD (12/2014)
- SFO-LHR: WTP to CW, SFO, 950 USD (1/2015)
- SFO-LHR: CW to F, SFO, £599 (10/2014)
SIN- LHR-SIN: CW to F, LHR, £599 (4/2014)
- SIN-LHR: WT to WTP, SIN, 450SGD (5/2014)
- SIN-LHR: WTP to CW, SIN, 1300SGD(01/2016); 1100SGD (12/2014)
- SIN-LHR: WT to WTP, SIN, 600SGD (10/2015)
- SIN-LHR: CW to F, SIN, 1300SGD (8/2014)
- LHR-SIN: WT to WTP, LHR, GBP 229 (May 2015)
- LHR-SIN: WT to WTP, LHR, £249 (8/2014)
- LHR-SIN: WT to CW, LHR, £749 (8/2014)
SJC- SJC-LHR: WTP to CW, SJC, $950 (7/2016)
- SJC-LHR: WT to WTP, SJC, $350 (7/2016)
SYD- SYD-SIN: WT to WTP, SYD, 499 AUD (8/2013)
- SYD-LHR: CW to F, SYD, 2000 AUD (7/2014)
- SYD-LHR: WT to CW, SYD, 2000 AUD (7/2014)
- SYD-LHR: WT to F, SYD, 2500 AUD (11?/2014)
YUL- LHR-YUL: WT to WTP, LHR, 229 GBP (11/2014)
- LHR-YUL: WT to WTP, LHR, 269 GBP (10/2015)
- LHR-YUL: WT to CW, LHR, 750 GBP (11/2014)
- YUL-LHR: WT to WTP, YUL, CAD 1000 (12/2016)
- YUL-LHR: WT to CW, YUL, CAD 1200 (12/2016)
YVR- LHR-YVR: CW to F, LHR, 635 GBP (10/2015)
- LHR-YVR: CW to F, LHR, 595 GBP (12/2016)
(AUP from UuA)
- YVR-LHR: WT to WTP, YVR, 250 CAD (5/2014)
- YVR-LHR: WT to CW, YVR, 999 CAD (5/2014)
- YVR-LHR: WTP to CW, YVR, 850 CAD (5/2014)
- YVR-LHR: CW to F, YVR, 900 CAD (10/2015)
- YVR-LHR: CW to F, YVR, 1000 CAD (12/2016)
YYC- YYC-LHR: WTP to CW, YYC, 650 USD (3/2014)
- LHR-YYC: WT to WTP, GLA, 740 GBP (8/2016)
YYZ- YYZ-LHR: WT to WTP, YYZ, 250 CAD (3/2014)
- LHR-YYZ: WT to WTP, LHR, £229 (10/2014)
- LHR-YYZ: CW to F, LHR, £650 (04/2015)
- YYZ-LHR: WTP to CW, YYZ, 850 CAD (10/2014)
- YYZ-LHR: WTP to CW, YYZ, 899 CAD (06/2015)
- YYZ-LHR: WTP to CW, YYZ, 850 CAD (10/2015)
- YYZ-LHR: WT to WTP, YYZ, £189 (10/2015)
- YYZ-LHR: WT to CW, YYZ, 999 CAD (05/2016)
- LHR-YYZ: CW to F, LHR, £549 CAD (09/2016)
- LHR-YYZ: WT to WTP, LHR, £229 (09/2016)
- LHR-YYZ: WT to CW, LHR, £749 (09/2016)