Topliss classic shower mixer. My shower was dripping, asked a plumber who said it likely just needs flushing, which I did by screwing in the blue and red seals. There is still
Shower Heads – Topliss Bros Precision Engineers
Standard 100 – Topliss Bros Precision Engineers
TB10 Standard Mixing Valve – Topliss Bros Precision Engineers
Replacing old Topliss shower mixer (# 169016) | Builderscrack
Topliss tb10 valve - can the waterflow be increased/decreased ? : r/diynz