Can i help? I personally have 2 cats myself and am in SE1. I struggle to find someone to sit for my cats at times, so if there are the odd days you need someone to pop in, play, feed and clean litter - I am happy to help . After all i feel your plight being in the same boat sometimes! :)
We help people with cats, feeding, emptying trays, and a little chin tickle if they are lonely - we've got a couple at home. DM me if you live around the Elephant and need someone to visit your cats while you're away.