I had trouble choosing a payment method, long story short…. by turning off ‘Enhanced Tracking Protection’ in Firefox the page reloaded revealing a code:
It appears to be a subscription for 3 months at 33p a month, so regular monthly payments. it says you can cancel the subscription at any time but I would guess that the whole 3 months would run anyway. Will update my device and then cancel and see what happens.
It gets a little weird, the offer says its for Europe but when I updated my device it gave me speed camera updates for the world.
NB: I know I could just use my phone/waze/etc but my 8 year old car has a built in sat nav and I’m pretty happy being able to update it cheaply.