It has the appearance of a Motherwort plant. Without flowering it is difficult to say for sure!
You can take a sample to your County Extension Office. They will be familiar with your regional invasive plants.
https://www.gardeningknowhow.com/edible/herbs/motherwort/motherwort-herb-growing.htm
https://www.gardeningknowhow.com/extension-search
why is this little plant growing under my cactus?
Unfortunately, it is far too young to tell. It looks like too many seedlings at this point.
You may need to wait until it gets a little more mature for an ID, but I would pull it so that it doesn't start outcompeting the cactus.
planted seeds which I thought were peas however don't look like any peas of beans I have grown before
That is not a pea plant in that photo. Maybe the wrong photo was posted by accident, but the plant in that photo is not a legume, or related to one.
It is a Brassica. Probably mustard, cabbage, or something related. It can be very difficult to distinguish such closely related plants.
Thanks for the response however we have some pea pods showing now
Can you advise what type of bush this is & how and when it’s best to prune it Thanks
It looks like a type of yew. Their fronds are soft rather than stiff. Here is info on how to prune.
https://www.gardeningknowhow.com/ornamental/shrubs/yew/pruning-yew-shrubs.htm
We were in Budapest and this tree was very scented, a bit like jasmine. What is this tree and can it grow in the NE of England.
It appears to be one of the many forms of Linden tree. (Genus Tilia) There are many varieties of Tilia and many will do well in your area.
This article will give you more information on these trees: https://www.gardeningknowhow.com/ornamental/trees/linden/linden-tree-information.htm
Shrub was destroyed in accident, I would like to replace it but unfortunately it was planted before I moved in so not sure what type of shrub it is. If anyone can help identify it I would be very grateful
I see, what looks like, the remnants of a pink flower that resembles an Azalea. The leaves resemble them too. It is possible that this is an azalea. This article will help: https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azaleas-noteworthy-shrubs-for-any-garden.htm
I took a cutting of this plant from somewhere but I do not know what it is.