Looks like a white spanish bluebell

I would concur with that id.

With aquilegia and something with sword shaped leaves which could be gladiolus.

Beattie you didn't i.d. the background plants - lol!

Well, erm.....
There's a photinia.... and erm, something yellow...
lol

Hold on girls! The white bell-like flower stem is growing right out of the middle of the sword-shaped leaves. At first glance I thought it was a white aquilegia, but there's no doubt it is growing out of the centre of the sword-shaped leaves Would it help if I took a close-up of this?

Bernard, I'm quite sure that you have 3 types of plant here, all erupting in the same spot.

1)There is a white bluebell and its leaves are the long thin ones that are curving outwards closer to the ground.

2)Then there's a clump of 5 or 6 things that might be gladis with the sword shaped upright leaves.

3)There are a couple of aquilegia seedlings that look too small to flower this year but should oblige next year.

The flower is definitely not an aquilegia.

Right Beattie - I'm off out with my maginfying glass and will report back - watch this space.
regards
Bernard

Looking closely at your photo I can see the bluebell leaves as well as the sword shaped leaves. Beattie's latest comment is correct.

You really are amazing! My examination of these plants is obviously a bit too superficial and I will try to follow the lead you lovely people have set. May I ask how you spotted that the Bluebell was the Spanish variety? I think all the Blubells in my woodland garden are Spanish and I have a love/hate relationship with them as they are a bit thuggish which presumably the English ones aren't. Soon after the leaves appear, they flop all over the surrounding ground/plants, so I've needed to choose plants to live with them to ensure they won't be killed off by being swamped. I'd like to keep it as it is presumably a gift of a bird and I'm (perhaps unduly) influenced by this until in some cases I discover that they are villains. In the case of this one, I'll try to keep it under control which the previous owner of the property failed to do with the blue ones of which there are hundreds.. I'd like to separate it from the gladis and I imagine I should wait until later in the year to do this.
Again, thanks very much for your help, it is much appreciated.

Spanish bluebells, of whatever colour, have flowers that go all around the stem and a fairly sturdy stem. English bluebells have flowers on just one side of the stem and droops forward on this side. Copy and paste the link below to see the difference:

http://www.whra.org.uk/bluebells.htm

English bluebells are thoroughly thuggish too Bernard!

If you want to separate all these plants, I'd expect you to have to dig a good way down to get to the bluebell bulb.

Like half way to Oz Beattie! lol xx

Probably dig the whole lot up to separate them. A job for the Autumn?

Or just leave them as they are?

Now, that's a thought! The larger leaves of gladis are surrounding the blubell, do you think they can continue to live like this? A bit like a forced wedding - might there come a time when they need to get divorced?

They'll be fine as they are Bernard, after all the put themselves together.

If they were mine, I'd be very likely to just leave them, or maybe tease the little aquilegia seedlings out and give them a bit more room. The bluebell bulb likes to sit really deep and can fight its way up through rocky soil - it does here. We dumped a load of spoil on top of them, but they still come through. The gladioli corms, assuming that's what they are, will be shallower in the soil and flower later, so they should all get on OK where they are.

This is fascinating - it's so good of you to share your knowledge with me like this. It raises the question as to how the blubell arrived. Would it have been as a seed droped by a bird. If so does the plant then embark on a journey down through the soil until it reaches its preferred depth? All the more reason for keeping it if it goes to all that trouble

Bluebells seed themselves all over the place - I don't know that birds are involved, the seeds aren't in a fruit that would be eaten. The bluebell "bulb" actually looks more like a tuber - it's a chunky part of the root that is often longer than it is wide. I guess the plant puts this storage organ down nice and deep so it's hard for hungry animals to dig down and find it in the winter.

So yes, Bernard, I reckon your theory is correct. The plant establishes itself at its preferred depth.

Bearing in mind it is the only white plant in the garden and is a couple of hundred feet from the nearest blue one, I'm completely mystified as to how it could have arrived.

It could easily be produced by 2 blue parents - I'll bet that "white flowers" is a recessive gene in bluebells, so it could arise sometimes from "normal" blue flowered plants. Have you moved any soil around? Or maybe the seed just got flicked there.