Landyman I’m no expert on the Rav 4 but the motability “hybrid” offering is not a PHEV so not actually an EV. The PHEV version starts at the high end of £48,000 so unlikely to make the scheme and if it does there are likely to be better BEV alternatives.
The Rav4 however is a very good option with it being a decent size and, IMPO, a bit of a looker and if you get the mid 40,s mpg, would be a very decent choice.