Wow! That is a huge difference. I once flew KL - SIN and the difference between economy and First was US$20!

I agree at this price, it isn't worth it.

I am hoping this is the last thing i need to ask before i book the tickets.
As we have already got the LHR-BKK flights booked and i will be purchasing BKK-KUL separately will i still be able to transit? -assume yes IF they check mu luggage and i will need to go to the transit desk at BKK to get my boarding card?
as you know LHR to BKK with EVA air
BKK to KUL - its says with Malaysian but i have noticed its operated by Thai will this make a diff at all (tried to by the ticket with Thai and its way more expensive)

Sorry to drag this on but i am a bit of a novice in transfers etc and dont want to get it wrong.

Thanks again

I would just book the 1945 flight and relax.
The KLIA Airport express takes about 30 mins and should be about every 20 minutes until midnight, I 'think' it goes also during the night.

The Malaysia Airlines website has deals BKK-KUL

You 'should' be able to check your baggage all the way with the connection on MH

Thanks JamesA am really stressing out about these flights!!!! (its causing me the biggest headache of the whole 16 day trip)

I put a 'value' on stress !

I would just book the 1945 hrs flight and then you can file that away as 'all set / all done' and don't bother with another moment of thought about it.

your so right and i am going to do just that.