I have "improvised" every piece of equipment I needed. Want to make things unique, strong, and cheap? Get yourself a decent welding machine (mig or stick but stick is easier/cheaper to maintain and learn IMO) and go to the steel yard. You have one somewhere near you. Use scrap or stock, it doesnt matter, as long as its built strong and safe. You can make the strongest equipment for the lowest price. The machine will put you back around $1500-$2000 US and you can use it the rest of your life. Very solid investment, especially if you use it for side work. It could easily pay for itself in a few months of side work. If you need help, PM me or crownshep about welding.
Thats the best I can do for you as I have no clue where to get equipment in the UK.
Good luck!