Virgin Rail (UK) Customer Service Issues

Good afternoon, I have been searching your website for details regarding train schedules over the Christmas and New Year period. Specifically, I am interested in the availability of trains on the 23rd, 24th, 27th, 30th, and 31st of December. Will there be more trains running during these dates or can we expect disruptions with fewer trains available? Our employees will be traveling from Manchester to London, and as a company, we need assurance that they will be able to reach the office on time. Thank you, [Initials]