Point of note: low cars go easily up the ramps ,just have to watch the front splitter carefully as the safety bar at the front is relatively high.Mine clears it by a whisker. (the bar is removable,theres a hoop one that drops in after to stop the car going back for any reason).I do have heavy duty solid rubber chocks I can use ,but the splitter clears the bar so all good.
Also with just a pair,watch the ground clearance at opposite end of the car when it starts to get high.Shouldnt be an issue but easily remedied with a couple of bits of wood to drive rear wheels on,or just a pair of those really low drive on plastic ramps,just to give yourself a few inches of breathing space if your car is REALLY low.
2 pairs of those will take your 1500 quid,the full prices with shipping and VAT bump it up.A pair is 700 quid to Kent..
But yeah they are really good,just need to decide if you go for an actual lift or these.