If you have previously had a gas oven and want to change to electric, you must make sure you have a dedicated circuit for the electric cooker connection. An electric cooker can draw high current, especially when cooking those Christmas dinners. Many newer cookers have 2 large oven compartments, grills and hob. If all of these are being used together a lot of current will be drawn. I recently dealt with a duel fuel cooker which was gas hob and electric oven. This could still draw a maximum of 7.7kW or just under 35A! The feed must be a dedicated circuit feed via 6mm thick 3 core cable from a 32A fuse at the fuseboard. It is also of upmost importance that this circuit is earthed.
Another important consideration is do you have 3 phase or single phase supply? If you have a 3 phase electrical supply, be careful when buying your new electric cooker. Not all cookers can be wired into a 3 phase system. If in doubt, ask the retailer. If the paperwork says 'double pole connection' this means single phase. With 4 pole being 3 phase. If you connect a single phase cooker to a 3 phase system, you will most certainly overload that phase and potentially be subject to power cuts.
If in doubt, do seek the advice from a qualified electrician.