Replying to @matthew barry’s post:
No doubt! Mine was working flawlessly until yesterday. Not even a hint of trouble. That said, it was attached to my house keys keyring, so it has certainly been through the mill. I’ve had it since day 1 of the scheme – perhaps you’ve got 30 days or so before a daily “borussian roulette” of will it/won’t it fit.
I’m mildly sad that my ‘Boris Bike Original’ key is out of commission now.