In answer to your question I am a retired police officer but never served in the traffic police. I am not claiming to be an expert or a smart ass. I am only giving my personal opinion (as we all are) as to the legality of stick on number plates.
Regarding Section 3a it refers to “Fixing of front registration plates”. When it refers to “registration plates” it means the legal definition of “registration plates” not what you, I or Joe Public may consider to be a “registration plate”, as I have said earlier, I do not believe a stick on number plate meets that legal definition.
As for “Vertically or, where that is not reasonably practicable, in a position as close to the vertical as is reasonably practicable,” this covers the rear plate which on a 7 is at a slight angle but not the front plate as Caterham have fitted the plates under the grill proving that it is “reasonably practicable” to fit them verticaly and there is no functional reason why they cannot be fitted in such a position.
In my previous posts I have given my opinion and reasons why I believe stick on plates are illegal. If you disagree with my opinion that’s fine, if you have one that’s fine with me. If you wish to purchase a stick on plate then browse “stick on number plate” you will find that these are now being treated by the traders as “an under the counter item” produced outside the UK and not for sale in say Halfords ... which sort of gives weight to my point of view?
We all like to personalise our 7's myself included but so as not to test “reasonableness”, “shades of grey”, the knowledge of your MOT tester or your average copper, I’d go for a registration plate from an authorised trader.
Edited by - oldbuffer on 10 Mar 2012 14:21:51