Red legged partridge in garden--any advice please?

Hello, I was just wondering if anybody could advise me as the local animal rescues are (understandably) closed due to the virus. 

This morning, we saw, for the first time, an unusual looking bird and have since identified it as a red legged partridge! It's not causing any problems and seems happy to potter around the patio, however I am concerned as our neighbours have cats and it doesn't seem in a hurry to fly off- looking online, I now don't think it's injured but rather, that this is normal behaviour for a partridge. (it's also managed to fly onto the fence, but didn't want to move and then hopped back into the garden). As I say, am happy for it to stay (in fact we are fascinated!) but would you advise it should be taken to a countryside setting or do we just let it stay in our inner city garden? 

Many thanks