From £595
Powacycle is the best of the many cheaper newcomers. Prices start very low, but ignore the cheap and cheerful jobs - take a serious look at the Salisbury and Windsor (effectively gents and ladies roadsters). For £600 these really are quite decent machines - NiMH battery, reasonable equipment (don't expect too much at this level) and range better than claimed, which is most unusual. There's now a lithium-ion variant too - Powacycle was the first mass-market bike with this battery chemistry - a lighter, but bigger battery for an extra hundred quid.
For prices and stockists, see Electric Price Tag
Genteel, budget roadsters