Originally Posted by
gcuk
The double TP holiday requires a start in the UK. The ex-BUD fare requires a start in Budpest. Adding the LHR-BUD-LHR sectors to the start and end of an ex-BUD itinerary would I think make it an ex-LHR itinerary and would price accordingly, considerably more expensive.
Edit: Beaten to it by a minute by
Applewood, but at least we appear to agree

Although, depending on your perspective/budget, LHR originating fares that are merely somewhat more expensive as opposed to considerably might be a better buy in the £/TP stakes with the double included.