I notice that neither Spitoon or Standard commented on the " taxi to golf one, hold short of the runway. after departure its a standard noise, then a left turn for WOTAN" call from ATC. Why not boys?
What's the problem with it? It is safe. UK ATCOs are taught that if one amends or passes a departure clearance, and the a/c is approaching a runway, then 'hold position, after departure.........' or 'hold short of runway xx/at holding point, after departure....' should be added, to avoid the departure instructions being misinterpreted as a take off clearance.
I see LnL has added some reasons why you might not get away when you think you ought to. Also, bear in mind that every departure from BRS requires a release (though I stand to be corrected!) from approach (and/or maybe Cardiff as well).