This is the High Street Apartment in Kessingland. It's a first-floor flat in a quiet mews, just been done up last year. You can walk to the beach from here, it's about a mile.
It says it sleeps four, but that's a double bedroom and then two sofa beds in the living room. So it's really best for a couple, or a couple with kids. It's a 3 Star place, so expect it to be clean and modern but not luxurious.
There's a pub and restaurant right next door, which is handy. The beach is shingle. Just up the road is Africa Alive, which is a good day out if you like that sort of thing.
You're on the Suffolk coast, so a lot of the good stuff is a short drive away. Southwold is about fifteen minutes north. Lowestoft is ten minutes south for the usual seaside things. For birdwatching, RSPB Minsmere is maybe twenty-five minutes drive. Aldeburgh and Dunwich are in that direction too.
In the flat you've got a dishwasher, WiFi, and a shower. Bedding and towels are included. There's no garden, but it's quiet. No pets.
Useful links: National Trust Dunwich and Visit Suffolk.