The switch process usually takes about 5 weeks. This is made up of:
Sometimes things can take a little longer, so don't worry if your switch isn't completed in exactly 5 weeks.
It's worth noting that if you have gas and electricity at your property, your supplies will always be separately switched — usually, it's electricity first, gas second. This means you might be asked to submit meter readings for each on different days, and your supplies might "go live" on different days too.