AEC Merryweather TL Southport FBOWM 261 was a Merryweather TL supplied to Southport FB in (I think) 1959. It was the only one of its type to have a two-man cab as opposed to a crew cab.
After coming out of service the ladder set was remounted onto a new chassis.
Picture added on 13 April 2013 at 09:02
The other mystery is that this was a TLP with crew accommodation for two members, while other TLs - even those without pumps - were built at that time to carry up to five or six crew.
If you are going to use a TLP as a self-contained water tower (which is the reason to fit it with a pump) you need at least three people - a ladder operator, a pump operator and somebody on the ladder!
Added by Rob Johnson on 13 April 2013.