There isn't three classes in the UK anymore. There are seven.
If anything these are more pronounced now than they were back in 2013 when this started being publicised as a thing:
https://www.bbc.co.uk/news/uk-22007058
Elite - the most privileged group in the UK, distinct from the other six classes through its wealth. This group has the highest levels of all three capitals
Most over represented occupations in this class: CEO / IT and telecomms directors / Marketing and sales directors, Barristers and Judges / Dental practictioners / Advertising and public relations directors.
Established middle class - the second wealthiest, scoring highly on all three capitals. The largest and most gregarious group, scoring second highest for cultural capital
Most over represented occupations in this class: Electrical enginners, Occupational therapists, midwives, environmental professionals, police offers, quality assurance and regulatory professionals, town planning officials, special needs teaching professionals
Technical middle class - a small, distinctive new class group which is prosperous but scores low for social and cultural capital. Distinguished by its social isolation and cultural apathy
Most over represented occupations in this class: medical radiographers, aircraft pilots, pharmacists, higher education teachers, natural and social science professionals, physical scientists, senior professionals in education establishments, business, research and admin positions
New affluent workers - a young class group which is socially and culturally active, with middling levels of economic capital
Most over represented occupations in this class: electricians and electrical fitters, postal workers, retail cashiers and checkout operatives, plumbers and heating and ventilation engineers, sales and retail assistants, housing officers, kitchen and catering assistants, quality assurance technicians
Traditional working class - scores low on all forms of capital, but is not completely deprived. Its members have reasonably high house values, explained by this group having the oldest average age at 66
Most over represented occupations in this class: medical secretaries, legal secretaries, electrical and electronic technicians, care workers, cleaners, van drivers, electricians, residential, day and domicillary care
Emergent service workers - a new, young, urban group which is relatively poor but has high social and cultural capital
Most over represented occupations in this class: bar staff, chefs, nursing auxiliaries and assistants, assemblers and routine operatives, care workers, elementary storage occupations, customer service operations, musicians
Precariat, or precarious proletariat - the poorest, most deprived class, scoring low for social and cultural capital
Most over represented occupations in this class: cleaners, van drivers, care workers, carpenters and joiners, caretakers, leisure and travel service occupations, shopkeepers and proprietors, retail cashiers.