10/11 SEA-LHR:
WT to CW - 1,099 USD
CW to F - 859 USD
Given WT to WTP was 1,700 one way when I was booking my flight with work, these prices are a good deal (or rather WTP was a BAD deal).

10/20 LHR - SEA
WT to WTP - 371 GBP
WT to CW - 910 GBP
Even though the flight was showing up as VERY full on EF and the lounge customer assistance didn't think there would be availability, there was a WTP aisle seat available and CW available (not sure if it would have been aisle).

I can't post to the Wiki yet. Can someone else please?