ah right, thanks for the feedback. Apparently its not an actually regulation yet but people are being recommended to carry them. I suppose it was naive of me to imagine they would be supplied when they aren't mandatory.
Not having a background in oil (although I do know a number of people working in the industry in Aberdeen) I suppose it just seemed sensible for EBS to be a requirement considering apparently nowadays drowning and breath hold time is a the main factor in fatalities.
Thanks again to everyone who is filling in the survey!