Something like cloud pruning is possible. Actual size reduction will be minimal, but it should allow a lot more light through, and a little more rain. It may take a fairly skilled arborist to do it well, so be sure to get references when shopping for one.

Conifers are rather unforgiving when it comes to pruning - a huge challenge for the most skilled arborist but still try to find one.

Sorry but if it was me I would take it down as it will get a lot bigger I think, it must really cut your light out & make it hard for some plants to grow, sorry if my idea is harsh but I once had a tree like yours where I once used to live & it made such a difference after I'd had it chopped down.
Jackie

I agree with Goldengirl/Lady Essex. Take it down because it's going to continue to cause problems and ruin the soil beneath. Also, Bathgate is right, pruning pine trees correctly needs someone who knows exactly what to do.

There must be someone here in Phoenix, judging by his/her sterling work in north Scottsdale and Paradise Valley. I shudder to think how much it would cost to bring the whole crew over to East Staffordshire, though! :)
Over all, though, I do recommend not buying a living Christmas tree unless you already have a plan to donate it to a public park, church, school, or other place where it will have a chance to grow.

I tend to agree about removing it The garden would feel odd at first but You might well be glad in the long run and it would give you more growing space. ( Sorry about the above - I couldn't get into it again to type anything)

Removing it would also give you more light inside. You'll be surprised at how much!
Find a pretty low growing shrub you like and, having dug in compost and/or manure, plant that in the place of the tree.

Thanks all, seems like the majority agree that it has out grown it's space now. It is a shame as it is a lovely tree, nice gnarly bark and large cones, when it was smaller, it gave welcome shade to the yard. Conservatory can still chase 40 degrees even with the tree there. Think I will have to fight my conscience and see if I can get rid, can possibly use it as an excuse to rework that area of garden.
Thanks again all for the guidance Kev

As a reminder of the tree you could when the tree is down save the gnarled trunk of the tree and set it in concrete somewhere in your garden if poss, hang the cones, lights, bird feeders & so on as a feature, Ha! Ha! Sorry there's me getting carried away again with ideas LOL
Jackie x

Before you decide to get rid of the tree please read the advice from the RHS. As gardeners we do all sorts of things in our gardens for which we receive no training. You obviously wanted to cloud train your tree or the Question would never have been asked. Take a deep breath, read the info on the link below and have a go. If it has to go after that fair enough but it would be a shame to lose an opportunity to learn something new. At 25 years old the tree has gained a lot of growth that will give you a head start. Be brave and let us see how it turns out.
https://www.rhs.org.uk/advice/profile?pid=540

Scotsgran, Thanks for the sound thinking, you have sort of hit on my plan, plenty of research and pondering, possibly leading to having a go. It's amusing really, as each time I walk under it, I keep looking up to certain branches and try to imagine the shape etc, if I was to remove it. Like you say if it doesn't work, it just means a re-think and re-working of that area
Cheers kev

Keep in mind that once you cut into the 'cloud', you'll expose a lot of bare wood and loose the nice rounded poofy shape. It's a one shot deal.

Kev,
I spent years looking at a buxus plant and seeing a bird. I took the plunge and had a go. It is not exactly as I envisaged it would look - yet. I am so pleased with my effort that I had the courage to have a go at making a cloud tree out of a dwarf pine. When I planted it I checked how big it would grow in 10 years. It is now 30+ years old and it had doubled the original estimate. I either had to remove it or cut it back. Making it into a cloud tree seemed like a good idea and I am hoping that it will be a success -eventually. I hate the idea of discarding plants which have outgrown the space they have available and I think you should be aware that you may not achieve instant success. Your patience will be rewarded if you can give the tree a few years to recover from being attacked. As this is a mature specimen maybe it would be kinder to faze the pruning over three years. I understand what Bathgate is saying about the "poofy" shape being lost but I think this is just the reason you want to see those bare branches. It is not working for you in this position but you might be able to achieve your goal. I would definitely give it a go.

Looking forward to seeing what you end up doing, please keep us posted :o)) x