I have just cleaned my oven and not sure how fitting go back in over burner leisure alto model al6ndw

call a local repair service they can test it and fix , unless it is really Old

Hello Susan,

it is not quite clear to me what you mean.
But I think, the ingition in the gas oven works and lights the burner.
and then after 15 seconds the burner goes out.
Any modern oven has a Flame Failure Device.
That prevents the oven getting gas when the burner went out for some reason.
I would suspect that FFD, it is mounted besides the burner.
You can not repair that part for safety reasons, You have to replace it when it is gone.

Kind regards, Dik
Flavel Leisure Cooker Spare Flame Failure Device FFD CO1464

accessed from the back

You plobably have the incorrect drip pans that do not have the proper holes for the grates to fit in, I would chech with an appliance repairman, he should have a source for the correct drip pans.

common problem,it will most probably be the solenoid FF device fitted by the oven burner,these can be obtained from Gas On Spares on 0121-585-7799.the will need the model number and serial number.

Drill out the rivets and replace with screws.. you may need a right angle drill or right angle drill adapter to fit the drill in there. Always take care and be sure to FIRST cut off ALL power to the unit and give it a good once over with your eyes to determine where the drill bit would follow through to prior to drilling - just to be sure you are not going to hit any other critical component...

remove rear panels (3; 1 white, 2 galvanised).
look under rear folded edge of hob. remove 2 screws in corners. dont lose 2 top hat rubber washers. from rear of cooker, lift hob slightly and push forward 1/2". lift hob off. dont over tighten new thermocouple union on back of valve (note how tight old one was)

By this description you gave it sounds as your oven burner has a flash back ,when it is like that does your flame look very yellow and gives off a Funny Smell ( which i Will think it is CARBON MONOXIDE . Remove the Oven burner make sure you watch for any wires attached to the burner (yes even in a Gas Stove) that would be part of your safety device . Make sure there is NO Rubbish in your Burner and your Burner
Well . Clean it out Make sure your Injector is Clear Carefully replace your Burner Making sure it fits over the Injector ,Replace any wirer if you removed any and relight

One. DO not use self clean on ranges unless you want to replace parts.
Two. Replace the thermal overload fuse.
Three. The manual should be in the console head.

the part that you need is the oven ignitor, located nest to the oven burner. that part gets hot to open the gas to the burner, that will make the oven work again.