There is often confusion around the ability to use "twist and go" in the United Kingdom, and the legality around them.

Many forums and online groups are passionately keen to modify standard pedal bikes with kits to give a bike more power, and the functionality to get on and go without the need to pedal.

However, most of these kits are high powered and can be dangerous. Technology has come along way so relatively light and cheap battery powered motors can be fitted to a bicycle, making them exceed the 15.5mph and over 250W EAPC limits without the design or brakes to cope. This is illegal, dangerous, and certainly not advised.

All standard electric bikes are limited to a max of 15.5mph assisted speed, and 250W output. 

So What Twist and Go Electric Bikes Are Legal?

In terms of Twist and Go eBikes, the law was updated in January 2016 to provide clarity and bring the UK in line with the rest of the EU's legislation.

Any electric assist pedal cycle (EAPC) produced since this date with a throttle feature is limited to 3.7mph (6kmph). This was issued in recognition that it is easier and helpful for those less able to get off from a standing start. 

Once the rider is moving faster than 3.7mph and not pedalling, the motor will cut off. If the rider pedals, the motor will activate again and assist up to 15.5mph.

At this stage, no DVLA registration or licence is needed.

I want to go faster than 15.5mph Without Pedalling

Any ebike capable of over 15.5mph through motored power requires type approval. Similarly, if a bicycle has twist and go functionality above 3.7mph, it would require type approval and DVLA registration as it becomes classed as a moped.

If you are looking for a fast Twist and Go electric vehicle that doesn't require pedal power, then you're best to look at getting an electric scooter or moped.

Alternatively, a Speed Pedelec electric bike will assist up to 28mph but still need some pedal power.

Either way you'll be needing a CBT license to do so!