I think that this may be the following fare, which is published at GBP 10.00 round trip (see the fare listings on Travelocity). The BD website then automatically gives you a GBP 2.50 discount each way when you book directly there. That would correspond with the reported effective fare of GBP 5.00 round trip or GBP 2.50 each way.
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Fare details for OWEBP01
ECONOMY CLASS RESTRICTED NORMAL FARE FARE
BK CODE
O -
PENALTY
CANCELLATIONS ANY TIME TICKET IS NON-REFUNDABLE. CHANGES BEFORE DEPARTURE CHARGE GBP 25.00/EUR 40.00. NOTE - CHANGE FEE IS APPLIED PER CHANGE PER SECTOR PER PERSON NOTE - FOR THROUGH FARES CHARGE GBP 25.00/EUR40.00 PER PERSON PER CHANGE FOR EACH TOTAL INBOUND/ OUTBOUND JOURNEY IF ORIGINAL CLASS IS NOT AVAILABLE PASSENGER MAY UPGRADE UPON PAYMENT OF THE DIFFERENCE BETWEEN THE FARE PAID AND THE NEXT APPLICABLE FARE PLUS CHANGE FEE. NOTE - NAME CHANGES ARE NOT PERMITTED AT ANY TIME AFTER DEPARTURE CHANGES NOT PERMITTED.
RES/TKTG
TKT MUST BE PURCHASED WITHIN 3 DAYS AFTER RES IS MADE. SGMTS USING THIS RULE MUST MEET ADV TKTG. SGMTS USING THIS RULE MUST BE CONFIRMED.
MAX STAY
RETURN TRVL MUST COMMENCE NO LATER THAN 12 MONTHS. MEASURED FROM DPTR FROM ORIGIN TO DPTR FROM LAST STOPOVER POINT.
SEASONS
NO SEASON RESTRICTIONS APPLY.
BLACKOUTS
NO BLACKOUT RESTRICTIONS APPLY.
EFF/EXP
THE FIRST DATE THAT TRAVEL MAY COMMENCE IS 1APR03 AND THE LAST DATE IS 14DEC03.
FLT APPL
APPLIES TO ANY BD/LH FLIGHT.
STOPOVERS
UNLIMITED STOPOVERS PERMITTED. A STOPOVER OCCURS WHEN THE PASSENGER DOES NOT DEPART AN INTERMEDIATE POINT WITHIN 24 HOURS.
TICKET RESTRICTIONS
NOTE: TICKETS MAY BE SOLD VIA BD WEBSITE/RESERVATIONS ONLY
DISCOUNTS
10 PCT OF THE ADT FARE IS CHARGED FOR AN INF PSGR UNDER 2 YRS OF AGE NOT OCCUPYING A SEAT. INF PSGR MUST BE ACCOMPANIED ON ALL SGMTS BY AN ADT PSGR TRAVELING IN THE SAME COMPARTMENT. *** NOTE - GENERAL RULE DOES NOT APPLY INFANT UNDER 2 WITH A SEAT - CHARGE 100 PERCENT OF THE FARE OR - ACCOMPANIED CHILD 2-11 - CHARGE 100 PERCENT OF THE FARE. TICKETING CODE - BASE FARE CODE PLUS CH OR - UNACCOMPANIED CHILD 5-11 - CHARGE 100 PERCENT OF THE FARE. TICKETING CODE - BASE FARE CODE PLUS CH.
REROUTE
SEE PENALTY.
TRANSFERS
UNLIMITED TRANSFERS AS PERMITTED ON THE ROUTING/MPM.
COMBINATIONS
CONDITIONS APPLICABLE TO ROUND TRIP/SINGLE OR DOUBLE OPEN JAW - -MAY BE COMBINED WITH ANY ONE WAY/ROUND TRIP FARE GOVERNED BY IPREURP RULE 4998/5001/5002/5003/5004/5005/5006/5007/5008/5009/5010 5011/5012/5013/5014/5015/5016/5017/5018/5019/5020 VIA BD. -MOST RESTRICTIVE CONDITIONS APPLY. ADDITIONAL CONDITIONS APPLY ROUND TRIP - -PERMITTED. CIRCLE TRIP - -NOT PERMITTED. OPEN JAW - -SINGLE OPEN JAW PERMITTED AT EITHER ORIGIN OR DESTINATION. DOUBLE OPEN JAW PERMITTED. END-ON-END - -PERMITTED WITH ALL FARES, IF COMBINING WITH FARES VIA BD. -CONDITIONS APPLY TO THE ADJACENT COMMON POINT FARE COMPONENTS OF THE JOURNEY. -TRAVEL MUST BE VIA THE FARE COMBINATION POINT.
OPEN RTN
NOT ALLOWED.
REFUNDS
SEE PENALTY.
CO-TERMINALS
NOT APPLICABLE.
INTL CONST
MAY BE COMBINED WITH APPLICABLE ARBITRARIES.
MISC
FARE MAY NOT BE USED IN DIFFERENTIAL FARE CONSTRUCTION.</font>
[This message has been edited by Globaliser (edited 02-16-2003).]