I'll kick off with Southwold on the Suffolk coast, it's a lovely town with a long sandy beach and a pier. The stretch of water by the pier has a blue flag. The pier is a new one & is free to go on. The High Street is quite upmarket with gift and ladieswear shops. If you head out to the quay you can crab, we caught plenty.
The downside of Southwold is the price of holiday accommodation, nearly 1000 for a week in school holidays. It's worth staying up to 20 minutes away and driving in each day. We stayed north of Lowestoft so it took us quite a while to get there each day especially as you can only cross the water in two places in Lowestoft ane the traffice was terrible.