Sorry where is the link as I'm not familiar with this
Thank you. We just see it on tik tok so don't know.The only HSTs left working out of London are with EMR over the MML. Screens today were advertising "The last day of HST operation", so I'm not sure if their use is guaranteed, but the thread @Darandio linked to is the best place to look.
Hearing rumour that 1B69 is cancelled with a brake fault. The set is currently at East Midlands Parkway 1B69 term at East Mids due to an Operational Incident. 1F70 start Derby.www.railforums.co.uk