Dave Arquati wrote:

Although it is the off-peak service Hanger Lane to West Ruislip, at
Chiswick Park, North Ealing to South Harrow, Harrow & Wealdstone to
Wembley Central, North Harrow to Northwood, Croxley and Watford, New
Cross and New Cross Gate, Mill Hill East, Kensington Olympia, Blackwall
to Beckton, and Roding Valley to Barkingside.

All irrelevant. "Tube style" implies "metro style", and was a
generalisation across the city's network and across time periods.

"off-peak [...] New Cross to New Cross Gate" FFS