Thank you 2old and linberl
What a quick response! I think you're all far more advanced than me in this bike-world so some of what you suggested was over my head (re covert etc) - I'll try to learn. I'm really looking for something I can 'buy off the shelf' . The bike I tried was Alpine Compact - lovely bike with securing wheel magnets, but too heavy. I also tried Volt compact which was slightly better but very unwieldy to lift and place. I've been looking at 'Wallet' by Cyclocity. Any good? I'll look at Tern and the others you suggest. Sounds like there are better options in USA but don't have anyone to assist - pity.