Hieracium aurantiacum, aka Grim the Collier and Fox and Cubs. In the wrong place it is a real thug, spreading by seed and runners.

aka Orange Hawkweed. Yes, can be a thug in the garden.

I have just rushed off for a pen and paper. It pops up in my garden in odd places mostly under hedges. I didn't know its name either.

Growing where it is it is a great plant and the butterflies love it - don't let it anywhere near your garden though!

Actually it's Pilosella aurantiaca now, has been for quite a few years.

A weed by an other name .....

Thankyou to everyone who answered my query. I'll be able to let my neighbour know what he now has in his garden. Although a weed it does look nice where it is , a warning not to get any in my garden !

If this is in your neighbour's garden I would suggest you encourage him to remove.

Thanks Moon Growe... the neighbour I refer to lives across the road from me so not an immediate threat ! As you can see from the pic his ground is fairly stoney & uncultivated.I read that butterflies like this plant .

Butterflies love it but, being across the road won't be enough to stop the seed blowing.The have fluffy seed heads similar to a dandelion so can travel quite a distance.

And wild orchids even further. I have some common spotted orchids in my garden and the nearest colony is half a mile away.

Thankyou for your advice. I must admit to liking a few wild flowers/ weeds & let them grow in amongst my perennials i.e Forget Me Nots . The bullfiches love the seed. As to Orchids I would be delighted if some would come my way. But I will be aware of anything taking over.