Come on wiggy, we've all been there, called ready when we were really not fully ready, entering the runway with the fingers crossed, hoping to be absolutely ready once we line up...
Usually we feel quite guilty about this, and when it does not work out, when ATC finds us out and no stalling technique has any chance to work without delaying other aircraft further, we dutily vacate the runway with our tail between our legs!
You can't use the checklist as an excuse to stall even further, unless of course, BA's line up checklist starts with 'cockpit preparation'