With a £5000 budget, you'll be looking at example from around 2008. They're generally reliable cars but not without their issues: www.honestjohn.co.uk/carbycar/honda/cr-v-2007/good

We'd recommend looking for one that's been well maintained with evidence of regular servicing (receipts as well as a stamped service book). They like to rust, too, so check the MoT history for any advisories for corrosion.