Elmhurst Park toilet refurbishment/ upgrade

Woodbridge Town Council own and manage public toilets in Elmhurst Park, Woodbridge, Suffolk. The toilets are very dated and suffer from periodic vandalism, but due to their location close play facilities and town centre, are a well used facility. We would therefore like to update the facility to offer modern public toilets, and therefore are seeking proffesional advice/ quotations on how to proceed. We would consider either a refurb of the exiting toilets (ladies, gents, disabled), or potential a complete redesign...