BTW one interesting thing about the Swytch is that in opposite to most other conversion kits you do not have to spread the fork or widen the dropouts. Both is to a minimal amount common with most existing conversion kits. So the conversion is easily reversible and in theory one could mount the swytch on a titanium Brompton as well, though I would personally not dare to do that.

Other than that the mounting of the swytch-bag with the battery on the handlebar seems to be a possible issue on the Brompton as the space for bags on the carrier block is then somewhat limited. In the test in a to b they stated a slightly higher use of battery power with the swytch than with the factory eBrompton, but not to a relevant amount.