Anyway, this evening a report into the issue has been released, and the author was being quizzed on Radio York. Original refurb of the 1970's shower room was budgeted at about 6K. Poor project management is being blamed for costs quadrupling, looks the like the Police Estates Dept will be carrying the can on this.
Sounds like of couple of ill-considered decisions were made without examining the implications. 1) Re-arrange the fittings the room - result soil stack had to be moved. 2) Specifying a mixer valve for the shower rather than the previous instantaneous electric one - result installation of a complete new hot water feed system. (To be fair, the CC had received an electric shock in the room apparently)
Couple of other unexpected things, removing some tiles revealed another layer of tiles, which had to be removed, which then required replastering - but it's a listed building so special plaster / techniques had to be used.
Well I'm going to ask if I can pop in a pee next time I'm passing - my council tax has paid for it!