My 40,000 service is looming, I'm penny pinching at the moment and the price from my local dealer is

sounds like a reasonable price as there is a lot of parts fitted on the 40k service

iirc

oil + filter

air filter

fuel filter

pollen filter

Don't just look in London - ring around, find the cheapst and get the dealer to price match - tell them which dealer and that it's near your mum's house or something so it's not inconvenient for you and they'll match the price - guaranteed.