(20 May 2021, 6:50 pm)big mac wrote I'm sure the service itself started earlier than that, I think in about 2007 as I used it then but that was on a weekend.  I can't remember whether when they launched it they had it seven nights a week straight away or not.

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Aye, pretty sure it went full 24 hours on launch.
Definitely in the period you mention, may have even been a year earlier.

Prestige's had been moved on to other routes by that point I think.