Looks like a rather battered green veined white to me Red.
Have a look here and see what you think.
http://www.ukbutterflies.co.uk/species_family.php?name=Pieridae
Yep, I think you have it with Black Veined
Tegenaria house spiders are pretty fierce when roused, but a bumble bee is no lightweight opponent. That must have been some battle.
For the battle to take place though the bee must have either been partially tangled already or else pretty weakened, and most probably both, so the odds were stacked in the spider's favour.
Either way, you were wise not to intervene between two battling females
Must admit there has been generations of spiders in that spot. Dark workshop and only one window that she has cornered.
The Bee i think is from a hive next door that has taken over a bird box. It was a right old battle and i would have put money on the bee but the spider looked so cool from the off and all the way through till the end.
Bees are designed to fight and subdue nectar and pollen. .
Tell that to my buddies hive - a mouse got in in the Winter - they killed it and walled it up as they couldn't move it!
That bee is a bumble bee rather than a true "hive" honey bee by the way. I would say likely Bombus hypnorum if it came from a bird box. Unknown in Britain till 2001. Its thorax is more yellow than I would have expected though so may be another species - def. a Bombus though
By this do you mean that the term "hive" is only a term for a honey bee dwelling? Know next to nothing about bees.