Hi Martin - welcome to the forum
You cannot keep us in suspense by just claiming to be from the South of the UK! Where are you from. I am from mid Kent.
There are a growing number of us from the UK chatting on here as we realise that the UK forums are unable to share the depth of knowledge that is available here.
What to smoke? Now there is a question!. As has been said above a lot of people smoke a lot of things - some which should probably remain nameless. It depends on what you like and what you want to try. There are basically two types of smoking - Hot and Cold - although there can also be a middle ground too.
For hot smoking you can find a lot of information on here on the likes of Brisket, Pork, Chicken, sausage (links) etc. and for cold smoking there is lots about Cheese, Salmon, vegetables and nuts too. There is also a lot about curing (smoked and un-smoked) if you are interested in Bacon, Salami, Chorizo etc.
I hot and cold smoke a wide range of things and for all the ingredients that you see the US guys use, they are either available here in the UK or have a direct equivalent.
Let us know what you want to try and we can help guide you to the most appropriate resources.
Great to have you on board