within that budget a full blown race car is an option providing you can move it around .

Heres a good place to look

http://fordracing.eu/forsale.html

Just looking at ebay there are plenty of options though

mk2 escort up at £6600

http://www.ebay.co.uk/itm/FORD-ESCOR...item3f3d314129

mk4 xr3i race/track car

http://www.ebay.co.uk/itm/Ford-Escor...item2340cf1f17

mk1 escort with subaru running gear only 6 hrs left and needs some work currently at £3300

http://www.ebay.co.uk/itm/Ford-Escor...item20ec73d099


escort mk2 track car £5595

http://www.ebay.co.uk/itm/FORD-ESCOR...item3f3d21f1a9

ford sierra unfinished track car £1295 buy it now great base for cossie conversion

http://www.ebay.co.uk/itm/FORD-SIERR...item1c46645920

other options how about a ford racing puma?

Mk5 zetecs race car?

All depends on what your after but I think your budget is plenty for track day fun. Im looking at getting something around the 3k mark at the moment and theres a fair bit of choice.