Probably not too much help but I live around the Beds/Herts region so know of some liveries etc around the RVC area. For full (even part tbh) livery I think it’d be hard going finding something under £500pcm (and most probably quite a bit above that) especially as you go closer to the London areas, but DIY obviously has a large variance (how far you’re willing to travel, the facilities etc) and I reckon you could find something under £200pcm. I’m not sure whether RVC allows own horses on site like Nottingham does, something you could probably either find on their site or email them about though.