The only named Networker Turbo 166204 'Norman Topsom MBE' leaves Bath Spa station working the 13.23 Portsmouth Harbour to Cardiff Central service. Back in my early spotting years, I spent many hours here at Bath back in the 1970s taking photographs, I stood in a very similar position back in November 1980 and took the following photograph, see....
https://www.ontheupfast.com/p/21936chg/29805505604/class-43-hst-down-working-bath-spa This unit was named in honour of the former Twyford station master Norman Topsom MBE who finally retired from the railway in November 2015.