basic smartphone for homeless man (islington N1)

HI. I am currently homeless and I sleep most days as it's safer and then sit awake at night in the train station at St Pancras. I had a basic smartphone which I could use to connect to wifi in the station for things like youtube and catch up TV but it has required an update and I now can't use it as it is too slow to watch programmes on. Does anyone please have an old smart phone or tablet that has the ability to watch youtube etc on that they could donate to me please? It really makes a huge difference as I am able to get some form of entertainment from it. Thanks in advance, happy to walk anywhere in London to meet you for collection