In looking for a new bag for the bike (after my Thule packed up), I came across the Ortileb Trunk Bag, and the Ortileb E-Trunk Bag. These appear to be pretty similar – it turns out they are the same thing. According to the UK distributor:

“It was initially launched as the E-Trunk as the features were requested by E-Bike users, but Ortlieb soon realised that it was also suitable for all bike users, so dropped the ‘E’”

A wise move.

There is also a Trunk Bag RC and even the Trunk Bag RC Urban. All the Ortileb Panniers & Bike Bags can be found here.