Police are urging McFly fans to plan their journeys carefully and to think about personal security when they come to Cheltenham for the Christmas lights switch-on.
Thousands of people are expected to descend on the town on Saturday, November 18 to see the stars perform in The Promenade.
Visitors are advised to allow plenty of time for their journeys and to use public transport where possible. People with cars are reminded to comply with parking regulations. Action will be taken against those who do not and illegally left vehicles may be towed away.
Drivers should also be aware that The Promenade and Crescent Terrace will be closed to all vehicles from 8am on Saturday while the event is set up.
Superintendent Martin Surl said: "Hopefully everyone will enjoy themselves but there will be heavy traffic congestion so you would be well advised to use other means to get to Cheltenham on this day and, if this isn't possible, you should leave early. We're anticipating a lot of young children at the event and we're also urging parents to make sure they're well looked after."
Cheltenham residents and visitors are further being reminded not to leave any valuables in their vehicles and to make sure items such as purses, wallets and mobile phones are kept safe from thieves. Carry valuables in a secure inside pocket or, if keeping them in a bag, make sure it is securely done up and carry it in front of your body so you can keep an eye on it.