If you go through Brookfield via Cuffley you can get to the pillbox sat over the north side of the golf course. Along the same trail you will get to the other which is sat in the corner of the field. This then takes you up to the rear of the farm where the 28 is that you photographed. Also on the farm is an old Anderson shelter. Nice trek. Get up above the housing estate in Cuffley. These are a bitch to get too though. Have fun and love the report.
Thank you for the infomation. I definatly going to go back for the ones ive missed. Do you know if the Anderson shelter is still there? I spent a while talking to the landowners who said they thought it had gone.