its Amarylis belladonna and isn't a true lily.
this is the link to the RHS page about them

https://www.rhs.org.uk/Plants/63092/i-Amaryllis-belladonna-i/Details

More likely to be one of the Crinums. Judging by the foliage, likely one of the better forms of Crinum x powellii. That is one of the hardiest Crinums, too, so more likely in the UK than the other hybrids. Amaryllis belladonna is more likely to bloom a month from now--two months where I live.

Yes I was rather hasty with my id. the leaves are already there so Crinum is much more likely.

I inherited one when we moved here, it's a Crinum and always assumed x powellii. It is under the window hemmed in by path edging and wall and desperately needs moving/splitting. Getting in there to get underneath is the problem - any suggestions?

If you are going to move or split it, I'd use a fork. Crinums don't like to be touched, so it will sulk for a year or two. If you do it as the leaves begin to die back, you should have 6-8 weeks before first frost so the roots can start to grow again. There are actually over 35 species of crinum, but x powellii is the most available. There are also a lot of hybrids and xAmarcrinums that look like crinums.

Thank you everyone I was given this lily and told it was an elephant lily but couldn’t find it anywhere just like to know the correct name.