Well, I'll have a pop at actually answering the quuestion…. 🙄
To be honest, I wouldn't bother with an electric one. They are expensive to buy, range is limited, and a bit too slow IMO. I'd rather cycle.
A proper petrol scoot will handle better, last longer, be easier to service/repair, have proper brakes, underseat storage, decent lights etc.
You can pick up a pretty nice used 50cc scooter for not much money these days. I'd stick with a known make like Piaggio/Vespa/Gilera (same company) Aprilia or maye a Jap one like Honda or Suzuki. The Italian ones are the best, no question. Well made and they last well, The y know how to make scooters. Avoid Peugeots.
Top of my list for what you describe would be a Vespa ET4 50cc. It's a 4 stroke engine, and the Vespas are built like tanks with the only metal body in production, they handle well and are very practical. And they look cool too. It'll easily do just over 30mph all day, you can ride without L plates on a car license (although you really should do a CBT) Cost peanuts to insure, £15 tax and should do around 100mpg.
If you want a bit more power, get the ET2 (2 stroke) which can be derestricted to do 45mph. But you'd definately need L plates and a CBT for that as it's no longer a moped if it can do that speed! That will be more thirsty, but should be cheaper to service.
And, (The important bit!) if you don't like it, you'll be able to sell it on for the same price you bought it for. Used values are rock solid.
Yes, I'm very biased as I ride a Vespa GT200. But they really are brilliant tools. I've ridden an ET2 (2 sroke) and was mightily impressed. Surprisingly nippy off the line (Faster than most cars in normal use)
ET4 50cc from a dealer, so top whack price, but VGC and virtually as new.
http://cgi.ebay.co.uk/2004-Piaggio-Vespa-ET4-Scooter-Silver-4855-Miles-/120604148893?pt=UK_Motorcycles