It’s best to contact one of your insurer’s approved repairers for ease, as they’ll work with them on a regular basis. If your insurer stated it will pay for repairs following your initial call, ensure you keep any receipts to prove payment. With an approved repairer, it’s likely that you’ll only have to pay your excess, as they’ll recoup the rest of the bill directly from your insurer.
If your car is going to take a while to fix, your insurer may provide a courtesy car from one of its approved repairers, but this will depend on the claim and the policy held. For instance, if your car is written off, it is unlikely that a courtesy car will be provided.