I have a Stoves double oven and after a power cut the clock has stopped working and the main oven is not working either. the clock is completely off. the small top oven is still working though. what can i do? i do not have the manufacturers instructions and don't know what model it is, i found it in the house when we bought it. thanks

The clock controls the ovens. In other words, directly you set any time on the clock, a contact operates within it to provide power to the ovens. (Normally the grill remains operational). You may need a new clock/timer. Before you do so, try switching the power off at the main isolating switch and leaving it off for a few mins, then switching it back on, to try to get the clock to operate. You may need to do this a few times.
Normally Stoves stick a label identifying the model on the left hand edge of the lower oven. You see this when you lower the main oven door. it will probably start with a 05 and be 9 digits long. With this number you can identify the oven and obtain parts.