Zero stars. Awful head office customer service. My son had an eye test at Scrivens Mill Hill Branch on 06/11/2021. We took him to specsavers two weeks later and chose glasses. We then needed the NHS voucher and phoned the branch that we were coming to fetch it. We were put through to another branch, miles away but would have been happy to fetch it from them. They refused and asked us to contact customer services, saying that data protection meant they would not release a voucher even if we came. We contacted customer services today after finding they were closed on Saturday. After much music and time on hold they refused to help, saying that would forward our request by e-mail to the branch. We waited a few hours for a reply but there was none. Phoned customer services again to be told that they cannot give us the authorisation code because they are not computerised and that the distant branch will not see the e-mail till Tuesday. Asked to speak to a more senior manager and told that there was not one available. We told our son we were going to order the glasses today (after failing on Saturday) and will now go ahead cheated of the voucher since it is more important for him to be able to see the blackboard. At no point was information given by the manager, who gave her name as Alleise, on how to complain. Either they don't care about children and vision at school or are lazy and incompetent, unable to imagine a novel solution to a problem, or they have a policy of sabotaging it when someone has the effrontery to buy for a fraction of the price elsewhere. The reason the original branch was closed was claimed by the distant branch to be a fire, but head office could not even confirm this. This company appears to be a dinosaur as concerns customer service and general business management.