Parents could be fined £300 for letting their child ride this type of bike

Parents could receive a fine if they allow their child to ride a bike that's too powerful for their age.
Electric bikes have seen a surge in popularity, but due to their potential speed, legal restrictions have been imposed. Official guidance states that anyone under the age of 14 is not permitted to ride an 'electrically assisted pedal cycle' (EAPC).
An EAPC refers to any bike which requires pedals for propulsion and must also have two or more wheels. Legally, EAPCs can reach up to 15.5mph without pedalling as long as it has a continuous output of no more than 250 watts and loses the ability to propel once it exceeds 15.5mph.

This implies that a bike is not classified as an EAPC if it fails to meet the aforementioned criteria. However, if the bike can exceed 15.5mph powered by the motor, has a continuous output greater than 250 watts, or lacks necessary pedals for propulsion, then it must be registered and taxed.
Moreover, it may require a valid licence, require a compulsory motorcycle helmet, and might need insurance. Failure to comply could lead to a fine or even the bike being confiscated by the police.
Parents could face fines if their children are caught riding electric bikes. If a child under 14 is found to be in breach of road laws by riding an e-bike, the parents may be held responsible.

If stopped by police, the bike could be confiscated and a fixed penalty notice (FPN) could be issued. However, the cost of the FPN can vary, with Norfolk Police stating that penalties are set and enforced differently across the country.
Some forces, such as those in Devon and Cornwall, may not issue a fine but instead impose a different form of penalty. However, many areas in the UK could issue a £300 fine and six penalty points on a person's licence.
According to Ethical Choice insurance, the police may decide to transfer the penalty from the child to the parent. This means that if the parents receive the six penalty points on their licence, they could risk having it revoked if it results in them accumulating over 12 points.
More information about the regulations surrounding e-bikes can be found on the GOV.UK website.
Daily Mirror