Sorry for delay in coming back too you, but I am a courier driver and work 6 days a week starting at 05:45 each morning so I had to get some sleep on Friday and as we have just moved I spent all day Sunday decorating, i just got in from work due to the bad weather, anyway back to the problem.
Tried F10 and took option ' Microsoft Windows Recovery Console' as it was the only alternative given
This gave a error message 'A disk read error has occurred' Press CTRL/ALT/ DEL to restart ' this does a normal restart.
F11 provided the answer required, restored laptop up and running.
Thanks for your help