Unfortunately, when the Council last 'played around' with the Square it made matters worse. The entrance for cars to park in the Square was changed from entry at the west end to entry at the east end, thereby causing congestion backing into South Street and not allowing cars and buses to move through. When the entrance was at the west end of the Square, cars which couldn't obtain a parking space just moved on down West Street and into the car park which, once again through a Council cock-up, cannot now be entered from West Street due to the metal grid across the car park exit, so drivers have to go along Bradley Way to enter now. Why not change this back to how it was as well as the old system worked well 15 years ago and would still work well again today.
Other than moving the entrance to the Square as suggested above, my only other recommendation would be to place a 'yellow box' area at the top of West Street down to the corner of Lo-Cost to allow buses to turn into the Square without having to queue behind waiting cars.
With the above in place there would be no loss of parking spaces, less congestion for through traffic and most shopkeepers content that their businesses won't suffer from customers going elsewhere to shop and Council interference.
I'd be interested to know what the consensus of opinion is of all the Square shopkeepers as it is their livelihood that you're playing with. Customers can go anywhere and if you make it more difficult for them for easy parking and convenient shopping then the consumer will just go elsewhere - hence the success of the major supermarkets just out of town.