Hi,
Personally I would avoid the Pro Action tent simply because it only offers a 1200 hydrostatic head, and I doubt if it would be able to stand up to some of the downpours we have been experiencing this summer. I spotted a nice looking 3 person Gelert which would give a reasonable amount of space for you on the GoOutdoors website and it comes well within your budget, also has 2000 hydrostatic head which may give more peace of mind.
http://www.ukcampsite.co.uk/redirect.asp?redir=http://www.gooutdoors.co.uk/5032307189343
Sorry no good at links on my laptop but if you copy and paste the above into your browser it should take you to it.
I love ebay, we bought our trailer tent and then recently our caravan. But go careful what you buy. My aunty bought a 8 person tent, with four sleeping pods for only £95. It seemed too good to be true and it was! The tent leaked on the first outing and all the seems came apart. Ebay is great for bargains but do some research on the tent you are buying and try to get well known brands, e.g. outwell, vango, gelert etc. cheap tent can equal cheap quality.
We have anways had Vangos in the past and found them to be top quality.
The pro-action is tiny, I know becuase i have one that I bought in an emergency. The bedrooms are suitable for two kids in each, no space for bags or equipment. For £60 you can still get something pretty adequate, especially on last year's models. How many people do you need it to sleep? You say you need space, but how much?
Guys this is great, thank you so much. I think im gonna go for the Gelert one as it looks sturdy. Im buggered if it isn't sturdy. I'm off camping in between Seahouses and Bamburgh in the north east. My first UK camping trip, my first tent. I went camping in Ethiopia for a few days last summer whilst in the mountains but that was school organised. I'm going with my friend this summer to get away for a week. Hopefully the weather will be a little kind.