Never had a problem, they stopped the secure parking a year or so back to build the new corporate portacabins, I do not know if they were ever replaced. So have used the railings at the east end since, I have had saddles removed and wheels unclipped but as they were all locked nothing taken. In the same vien my wife has left her lights on the bike and a mate left his unlocked once and was no problem.
Its okay but I imagine not as safe as the county ground, I never imagine anything ever being pinched there.