It's one of the Sedum family, they 'do' have pink flowers at this time of year.

Sedum spectabilis, probably Autumn Joy.

Butterflys and bees love them.

Thank you.

Just one query, I always thought sedum were low ground cover plants.
This is well over 2ft high (& 2ft wide.) It seems to have trebled in size over the last couple of years!

This is the tallest i think - mine flops over :-(
There are a lot of ground cover ones though, all different colours too.

This flops over too!

Years ago someone told me it was an 'Ice Plant' but on checking garden books for 'Ice Plants', it didn't come up with the same pic!
Anyway thank you all for your answers.

Common names aren't as accurate as using the latin name and it can lead to confusion, especially with people new to plants and their names.

I wish everyone would still use the common names!

It is commonly known as Ice Plant where I live, but Ice Plant is also another quite different plant, so hooray for the Latin names, at least we know what we're all talking about.

Common names are all very well but what is a common name to you may not be to me or someone in the USA or China or Japan and we do have a lot of overseas members on here and as Bamboo says, the Latin binomial refers to one plant and one plant only.

Except that the horticultural gurus seem to take a fiendish delight in changing the latin names with depressing frequency.

Blame the rules for that. The first properly published name for a plant is the one which must stand, unless there are good reason for keeping the name as it is. Some Rosa will never be changed, for example. The other reason for changing is down to science. Geneticisits researching plant DNA are finding that plants which were place originally in one group or family are not actually related at all, so the name must change. Believe me they do not change names without a great deal of diascussion.

And fortunately, if you google a plant under its old name, it generally comes up with the right plant and gives you the new name too. And then there's that (syn) thing after some plant names to help too.