Yes, you can use an e-bike if it complies with current legislation. It has to be pedal assist.
This means the motor provides electrical assistance only when the bicycle is pedalled and ceases to provide assistance when the bicycle reaches a speed of 15.5 mph.
No e-scooter, or non-pedalling type electric bikes are allowed.
You should already be experienced riding an e-bike before joining one of the rides.
Bear in mind that e-bikes can be quicker and that riders not on e-bikes may be riding more slowly.
Also note that ride times are based on non e-bike speeds of travel and so e-bikers will need to adjust their speeds accordingly.
Please ensure the battery has sufficient charge for you to be able to complete the ride.