Douglas, watch out for that Fat Old Git..........he lies like cheap chinese watch!!
Welcome to this fantastic Forum, boet!
I have been living here for 10yrs - made in Hampshire and born in Durban. It is a great country this, you cant compare lifestyles but it is still a decent place to live and work with plenty of great trout fishing.
I London, there are rumours of a few wee streams in greater London but you will need to ask around on the Forum. Stillwater-wise - you have Syon Park in west london though you will need to get a taxi from the station whilst walthomstow is walkable from the end of tube line.
If you can ever get out to Benfleet, Essex (from Fenchurch St Station) I would be happy to take you to Chigboro or a session out on Hanningfield Reservoir and have enough tackle to go around (ignore the jibes that will follow that statement

)
Take care on the ice
Best wishes
Ben