As you will probably appreciate, a budget of £120 doesn't give a huge range of good options. Even AMD, that normally "comes to the rescue", at the budget end, can't offer any particularly palatable choices.
Being limited, in order to give some ability to upgrade, in the future, I think using Intel, with a Pentium processor, at least gives reasonable performance, now (better than an AMD Phenom alternative), possibly Intel Pentium G850 2.9GHz. That is available, from EBuyer @ £51.44. For RAM, I would suggest using GSKill 4GB(2x2GB) F3-12800CL9D-4GBXL 1333MHz DDR3, available from Novatech @ £24.98. There are slightly cheaper options for RAM, but there's no point, to save £3 or £4.
The question then, is motherboard. If you want to keep to budget, and get decent performance, using above components, I would suggest ASRock H61M-S. That is available from Amazon @ £39.72.
If you can stretch budget, a bit, it may be worth considering a motherboard, that gives you a decent upgrade route, all the way up to something like i5-3570K, a quad core Ivybridge, with overclocking. Whilst it would be slightly overkill, with a Pentium, at present, a Z75 board would allow you, if you wanted, to step up, in future to use Ivybridge, overclocking, USB 3.0, etc. Currently an ASRock Z75 Pro3 is £74.34 at EBuyer. (You could probably get it £10 cheaper, with a bit of shopping around). Nothing like essential, but worth a thought, if you think you might want to upgrade, in 12 months, say, without having to spend a fortune, then.