This is what I have chosen in the end after deciding that it was just as cheap and definitely easier to buy a ready made bike, hopefully it will arrive this week , in bits! so hubby will have to put his thinking cap on and build it. I realize it won't go where I can with my normal bike but it seemed the best of what what available in my price range, its Australian and sells for double the price in the shops so fingers crossed I can learn to ride a trike, we can put some better tyres on it if needed and I might even buy a spare battery to carry if the range isn't as good as the one I have at the moment.
http://www.ebay.co.uk/itm/271990735930?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
http://www.ebay.co.uk/itm/271990735930?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT