Further to my first posting re swivel bench seat ideas I have now removed complete and replaced with a standard seat.
The seat being able to swivel is a great idea but just about all the storage space is lost underneath with the mechanism and for the amount of times we needed to turn it was far and few between. So for us we would rather have the storage space under the seat which I will fit now fit draws to suit.
I have put the seat on the "For Sale" section of the web page
Thanks for everyone's input and help on this topic