To add to the confusion, you can get range cookers with gas one side, electricity the other side (we have one of these).
Gas is supposedly better for bread and baking (it is more moist or something, I can't remember), so some baking types like them more.
Gas tends to be a bit more uneven (hot at the top, cold at the bottom) compared to a fan oven (although I think you may be able to get gas fan ovens nowadays).
Our gas oven has timer on it to turn on/off, which is fine, exactly the same as on the last house's electric. We always end up using the gas side, because it is way cheaper to run.
If we had a just electric oven, we'd need to have it on a dedicated circuit, so would have needed the electrician in, as our house didn't have one (previous cookers were all gas I guess).
Joe