Found fledglings in cupboard

I’ve just had two fledgling sparrows fall in to the cupboard/hidden pipe area where my stopcock is. I can’t see a nest nor would i be able to reach it if i could!

Does anybody here know what i should do? Or be able to link me somewhere that would telle what to do?

I know your to leave them outside or under a bush but I’m not quite sure what to because i found them in my house.