I need a new cooker so advice needed please

I have similar problem but no easy solution! Wanted to replace gas cooker (all gas) with one with gas hob and electric oven, but would have needed new wiring - even if only oven electric. Made various attempts to get electrician to fix the wiring, but something went wrong each time!
Decided to go for another all gas, but very little choice. Got one in the end but it's not great.
One temporary solution for you, Grammaretto would be to get a mini-oven/grill (Argos ones are fine) and a double induction hob - one that sits on counter. Both of these plug into normal sockets so no wiring needed. This would give you better cooking facilities while you sort out wiring for electric cooker.
Or you could try to find an all gas cooker - there are some still available. Neither will heat kitchen, unfortunately

I agree with Oops, and would go for the Leisure cooker as it's free.

That said, I have just scrapped an electric Leisure cooker (not the range-style though), because after only seven and a half years, the only thing still working on it were the hobs. The fan went twice in the main oven, the first time after four years, and the top oven/ grill stopped working properly around the same age. A few weeks ago the fan went again, and both ovens stopped heating altogether.
I wouldn't recommend them to someone looking to buy!

I don't think that gas is actually being phased out but will be replaced by hydrogen. I think any new gas cookers will be able to use hydrogen as well as gas.

DD1 has an Everhot, plugs into a power point, when she was in her other house it was linked to heating etc. But now is just on all day heating the kitchen.
TBH if you’ve been offered a free Leisure range cooker then I would go for that, maybe you could sell your Rayburn for parts?