nothing I have ever seen in England.

grapevine?

Have you asked your neighbor?

berries are about the size of a pencil eraser, jucy with tiny seeds. neighbor does not know....

Hard to say...a close up of a leaf or berry might help but maybe it is a nightshade. There are so many varieties and differences in the color of the berry. Very poisonous if it is-but lovely. Watch your dog around this plant (if you have one). ...it happened to me :-(

At first I thought this might be a form of bittersweet (celastrus), but due to the leaf shape and berries I'm pretty sure it's a member of the nightshade (solanum ) family as well.

The only thing is solanums usually bear their fruit in clusters not in singly.

http://plants.usda.gov/java/profile?symbol=SOAM
http://images.google.com/imgres?imgurl=http://www.biolib.cz/IMG/THN/_18609.jpg&imgrefurl=http://www.biolib.cz/cz/taxon/id40750/&h=100&w=75&sz=4&hl=en&start=110&sig2=3a7q9dT8dH7MR2pVa_2TZg&tbnid=9Hxg0NyCRywOAM:&tbnh=82&tbnw=62&ei=1N5jSJqmMI_eigGu5fSlCw&prev=/images%3Fq%3DSolanum%2Btenuilobatum%26start%3D100%26ndsp%3D20%26hl%3Den%26sa%3DN


Without a close-up of the berry, flower and leaf, it's hard to tell.