What is this??

[Kitsmummy]

Found down the side of my house, looks similar to a nettle. It’s v pretty and I’d like to dig it up and plant in my garden, but will I regret it. Is it some sort of rampant weed?

Jack by the Hedge, also known as Garlic Mustard would be my guess.

Thanks guys! I'll look got a shady spot for it

It's easy to keep under control - it doesn't have long underground runners, for example. It's been a boon in this days of hard-to-get supermarket delivery slots - it's featured quite heavily in our lunchtime salads.

It's a major foodplant for the the orange tip butterfly - they lay their single orange eggs on the flower stems.