We parked on the National Trust car park at Horsey Mill (£3 all day!)
This is the link for the details on the National Trust web site
The walk around the Mere is lovey with wide foot paths
Stopped for a very enjoyable coffee at Poppylands!
The walk took about 3 hours (with 2 stops) to complete and was it was lovely to be able to take in the scenery of the mere and marshes as well as the Norfolk coastline, thoroughly recommended!!