Just had mine done by Gallagher Flooring. www.gallagherflooring.com

High gloss epoxy finish.

Budget for approx £5.5k+VAT. for 2500sq ft.

Sounds dear but the prep was intense, incredible amount of material, very efficient firm, 4yr no-quibble guarantee. In and out in three days, but coming back later for a couple of snagging items and to finish painting hazard lines.

By the time you've buggered about doing it yourself a few times, it's money well spent in my opinion.

Joe