For most family kitchens 90cm is the standard choice, because it gives two ovens and a five-zone hob in a manageable width. Choose 110cm if you regularly cook for a crowd and want a third cavity.
Most range cookers are delivered within 3-7 working days on the UK mainland. The Scottish Highlands and Islands, Northern Ireland and other UK islands typically take longer. You get a delivery slot by email once the retailer books the appliance in.
Many retailers offer free delivery to most UK mainland addresses. Parts of Scotland, Northern Ireland and the islands may carry a surcharge. Check the product page for details.
Most electric range cookers do. Anything drawing more than 3kW needs a dedicated circuit and a 32A or 45A cooker switch rather than a 13A plug. A qualified electrician should make the connection, so budget for that when you order.
The oven locks and heats to around 500°C, burning grease and spillage down to a fine ash that you wipe out once it cools. It is the most thorough cleaning system available on a range cooker.
Induction heats the pan directly, so it responds instantly and costs less to run, though it needs magnetic pans. Ceramic is cheaper to buy and works with any flat pan, but it is slower to heat up and to cool down.
Two cavities suit most households and let you roast and bake at different temperatures at once. A third cavity is worth having if you cook large meals often, since it frees the grill up and gives you a slow oven.