In reply to Stopsy: I presume for 15 quid you are talking about downhill ski boots not ski-touring boots and these are very different.
I've seen people ice climbing in downhill ski boots here in Finland but at crags that rise directly from very flat ground (well, actually its from a frozen lake, not ground - but very flat!). They had walked across the lake wearing hiking boots and swapped into the ski boots sitting on their packs at the bottom of the icefall. They were also only top roping. But the boots do take step in crampons fine.
Having said all that, on any hillside in the UK getting up to a climb I would imagine downhill boots would be pretty deadly without crampons and very very hard to walk in with them. Basically, it won't work.
If you're a youngster without much cash, I'd see if you could find a few days work and earn enough to buy some real boots. My first goretex jacket was funded by some long days picking fruit and my first ice tools were mainly funded by gutting geese and turkeys!