Wow, sounds like a nightmare, and I thought East London was dangerous
LOL! As I say, my cat only goes in my back garden, but my friends 5
cats are out most of the time, have had all their shots, never run into
stray dogs (don't think they let dogs out on their own round here), and
would go crazy if they were in all the time. They don't go far away,
but nobody seems to mind them visiting their gardens, no-one ever
complains. They have flea collars, and never get mites or ticks here.
There is no way they could keep them inside, and wouldn't want to
restrict them like that, and they come to no harm.