Hi all, thought I would just let you know, I went into Firth Park yesterday and saw some dog cages. I don't know how good they are as I have never used one but I thought they were pretty cheap (although again I don't know much about them), they had two sizes, one was medium and £20, the other was quite large and was £25.
Anyway, not sure if this is of any use to anyone but thought I would mention it, the shop is called something along the lines of Global Tools, sells tools and electricals etc