2005 Vauxhall Astra cutting out after a few min when it gets warm

hi my 2005 astra 1.6 petrol is playing up, has been fine uptill yesterday when it cut out when driving and would not start again, got it recoverd with the aa , now its home it starts fine from cold and runs for about 5min then cuts out and will not start again untill its cold again, ive checked the throttle body and its nice n clean, ive got fuel up to the rail, ive had it code read oebd and no code stored or pending codes recorded , ive also changed the plugs and coil pack but have made no difference ,we also did a live data reading with a basic reader and everything except the fuel trim which had negative reading? is that normal?
if anyone can point me in the right direction to look next i would appreciate it,
thanku in advance