OK, enough is enough, I've been toying around and reading forums for a while now. Even thought of getting a decent dc arc welder to be able to do thicker stuff and tig smaller section but I think I will opt for the Clarke 151en as I can use it outside and in and add gas for decent looking welds if needed and I understand you can weld from around 1 mm through to 5mm with the unit.
Can I just say thanks for all contributions and of course the code for the vat free days.
Great forum and I will stick around and hopefully when I reach a decent standard through lots of practice I will be able to return the favours to newcomers.
Thanks again guys.