Thought it was an hummingbird. But never seen one before and not native to the East Riding of Yorkshire. Sparrow size and colour with distinctive small white bum patch, think of a rabbits bottom. No white underbelly just its specific bum area. Was hoverin

Quite a lot of small birds have the ability to hover for a short period of time, so what you've seen is not going to be a hummingbird. Do you mean white on the underside of the tail, or at the top of the tail. If the latter then it could have been a wheatear.

Thanks Cris.

no it was bright white round its bum hole only, no other white or colour. The white was pronounced due to the bird being dark colours. The hovering and white bit drew our eyes to it. Husband thought he saw a 2nd one in the cherry tree.

No the cherry tree has shed its bloomage.  But the honeysuckle next to it has a bit of life left in it but no flowers but has gone to green seed. The bird was definitely hovering at superspeed.

As you thought it looked like a Hummingbird, is there a remote chance it could have been a Hummingbird Hawk moth which would hover around flowers to get the nectar ?

That's what I was going to suggest too. Chimes with the honeysuckle - a favourite for the hummingbird hawk moth. They are a lot smaller than sparrows though.