Great idea Anotherjohn.

I suspect £100 would go a long way towards covering the costs of the printing. (100 A3 posters costs about £60 not including any design costs).

Any poster that is designed needs to mention that Perry Vale is only free for 30 minutes. Both car parks are free every Sunday.
And in both car parks you MUST display a ticket otherwise you get a penalty notice, even if you are parking for less than 30 minutes (except on a Sunday).

The posters could even have space for arrows pointing the way to the car park (creating a trail through the high street for cars and pedestrians). There could even be space for shop keepers to fill in: "This shop is __ minutes walk from Piercefield Road car park"

I think this would be a great initiative for the FHTA.