Britannia Range Cooker

[cakeman]

Got a Britannia 90cm Range Cooker
has gas burners and 2 electric ovens , very popular version of their cookers i believe as i have seen many
is approx 10 years old or so, and has served us great
no sign of any model number on the cooker anywhere

the smaller oven on the right has developed a fault
turn it on in its usual way and nothing happens , no power
turn on the bigger left oven and the right oven springs into life
sometimes the right oven switch will work ok for 2 or 3 seconds

any ideas

 

[cakeman]

bump

 

[Leccy758]

check selector switches and wiring for arcs or breaks, not much else to suggest that is easy or safe to advise and do