Looks like an Arum, maculatum maybe. You haven't put a pic of the leaves but if they;re patterned it could be Arum Italicum.

Leaves will have died back by now Thorneyside

The Arums have often lost their leaves completely by the time the spike of berries turns red, so hard to say which it might be - the other possibility is Arisaema triphyllum. Best thing to do is wait to see what grows there next year in terms of leaves/flowers, the difference will be obvious, certainly with the flowers.

Thank you all for taking the time to reply.
Yes there were a few leaves at the beginning but they did lose their leaves early on. It has been fascinating watching these (brother and sister - I've been calling them) grow into maturity and now change colour.
An old gentleman owned the property previously who was obviously a keen gardener. There has been allsorts of blooms appearing throughout the summer - as soon as something dies off another bloom appears. The previous owner knew what he was doing with the timing.
Unfortunately I'm a complete novice who is however looking forward to learning a lot.
Thanks again for your help. Brenda

I should say don't attempt to eat the berries - they're toxic.

And it's often a weed in gardens.

Berries may be toxic but no-one manages to eat more than one. It is reputed to be like trying to chew needles.

One of its politer country names is Jack in the Pulpit.When it flowers you will see why.

Sorry Landgirl depends which Arum it is whether you view it as a weed or not A Italicum is a very welcome part of our garden!

My only thought is it looks very tall for A maculatum.

Yes, the berries taste awful and within a couple of minutes you'll get tingling in the mouth.

Sometimes called cuckoopint and most people pronounce it as in pint of milk. It should be rhymed with mint because it is short for pintle.

Haha Pg, I never thought of that! Most of its country names are on the same lines...

Arum maculatum has the largest number of local names of any plant in Britain. Think it is about 19 without going and looking in the book.