I myself also suffer from white coat syndrome.
Last year on my renewal my BP was taken and it was 150/100,the ame could tell I was nervous and told me to lie down.20 mins BP taken again this time 160/100.
The ame couldn't sign me off there and gave me a 24hr monitor.
The readings came back at 128/80 fairly normal.
Seems that white coat syndrome is fairly common.