A Francis

SUCCESS!!!!! It was the "deadlock" - I put a little wd40 on the key and used a little force after turning the key and bingo.... I actually heard the bolt/lock unlock. Many thanks to all of you for your replies and the time you took to explain and educate me - thank you!!! Have a great remainder of the day.

Thank you both. Deadlocking is a possibility and will therefore try more force. I have a couple of things to try first: new fob battery and more force with the key. Will certainly let you know how it goes. Many thanks and have a great day.

Thanks again Mark and thank you Colin Easy bits first - no its not a smart key fob, the bonnet catch is in the underside of the dashboard to the right hand-side of the steering wheel, owners manual is in the glove-box (but I will check online for the manual to see if the bonnet can be opened without being inside the car). Deadlocking the car /door is new to me but wonder if that is something I could have done inadvertently... I drove the vehicle last week but will certainly try more force in case the mechanisms have become stiff... Will certainly purchase a new fob battery also as another first step. Just on the car battery - previously when the battery has run low (more than 18 months ago) the door still opens with the key and it not doing so on this occasion and this has baffled me also. Many thanks - appreciate you taking the time to help....

Thank you Jason and thank you Mark. Mark - the key turning fails to unlock the door, neither the fob or key unlocks the door. Jason - the fob's red light flashes when pressed suggesting the battery is fine but I will purchase a brand new one to see if that does the trick. Appreciate you taking the time to help....

My SC430 doors will not open, neither with the fob (black with 3 buttons: lock, unlock door, unlock boot. Fob light blinks red on pressing) and not with the key either. When trying with the key it can turn both left and right, the alarm activates and interior light and hazard lights flash. Nothing different was done after last driving the car.... anyone any idea why this is happening /solution? Many thanks