Although it feels like ages I guess its only been a few days. Subs are paid and the plot is staked out. Of course this has left lots of time for research and planning. To kill and rotovate, or cover to suppress and do things bit by bit, or - current favourite - turfcut first then rotovate.
Found some nice pages of others who've done just that, together with ideas on what to do with the turf (form a barrow 2ft high, grass down, then plant spuds - great loam next year), designing for beds (leave some turf to allow barrows).