Ah ok. What’s the difference?
Between HST and LHCS Mark 3s?
Plenty, and including:
Buffers: HST doesn't have them, LHCS has retractable
Couplers: HST have Alliance couplers (fixed buckeye), LHCS has drophead buckeye
Train Supply: HST uses 415V three phase, LHCS has 850V (nominal DC or single phase AC) and motor-alternator (or static converter on Chiltern sets) to generate three phase supply
HST stock has 36-way sockets and through cabling to allow power cars to multi; LHCS has RCH jumpers
HST stock has duplicated brake pipes at vehicle ends