I have a New World Plan 7 Cooker, the lid is supposed to turn off the gas when it shuts as a fail safe but it no longer does. I had a British Gas Engineer round yesterday to install new smart meters, and found this problem and had to condemn the cooker!!!! Is this a repair I may be able to do myself?
http://www.diynot.com/forums/viewtopic.php?t=244304 here is a link to possible causes,new world sell parts too so you can fix it yourself,i would try a bit of wd 40 where the button is to cut it off just might have greased up over the years.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix gas cookers.