Looks like a Crassula of some kind, not sure what variety. Might be worth leaving if its in an area you haven't cultivated yet to see if it flowers.

Thanks Bamboo,
I do have a little border which I could leave it in.

how about Summer Purslane (Portulaca Oleracea)...
you can eat your way through it as it's is a culinary herb.
i had loads of it in my last garden, must admit i didnt actually eat it but it is groundcover and easily pulled out.
they are tender.

Hi Resi,
I can't eat my way through it as quickly as it is colonising my garden!
It does pull up easily....but BOY does it spread!!!
bwt...what do you do with it, culinary speaking....
K

http://173.1.12.3/Beverages-Health-Food-Articles/RawWorld/Vegetable/Summer-purslane.aspx

i found this site on its health and cul. properties
it tells you better than i can, i never knew it was THAT good!
i remember it spreading :-))
but funny enough i havent seen it in my present garden, not many miles away from the old one.
looking at this website makes me think i ought to go and pull some up there as i am sure it still flourishes, i could never get rid of it either

i just saw you are relocating to Nigeria, will you keep your GoY blog going from there?

I do hope so, Resi...I have someone looking after things here and will be back for the summer months...and I'm hoping to start some sort of outdoor green space as soon as I get to Africa...gardening in two continents! Should be fun!

I am now going to check out that summer purslane link, thank you! :)))