legal Dilemma: I take picture of my vote (not another's) If Police or Staff ask to see it they are asking me to disclose my vote?! ergo prohibited!
I think staff demanding to delete anything is going to far, they should politely advise as follows:
"Taking photos/video that may disclose how another person has voted is illegal under Section 66A of the 1983 Representation of the People's Act, If you have taken a photo/video that may disclose another persons vote you are advised to either delete it, or seek immediate legal advice.
If staff believe you may have contravened the 1983 Representation of the People's Act they may pass your details on to the Police or other regulatory body."