Working in London today, parked up at Stanmore right on the Jubilee line which goes to Canada Water (which I think is the nearest tube station to the ground...)
I was just throwing numbers around...
As requested:
Average salary in Cov = £33k (per payscale.com)
Weekly = £635 (rounded)
Tax & NI = £126
Take Home Pay = £509
Ticket cost as a % of income = 7.3%
UK minimum wage = £10.43/hour
Full time employee (40 hour week) = £417 (rounded)
Tax & NI = £56
Take Home Pay = £361
Ticket cost as a % of income = 10.2%