If you need a Covid pass to go on holiday this summer, and you had your jab at the vaccination centre at Haskins in Shepton, the advice is to check your documents in plenty of time. It has been revealed that a "technical glitch" meant that some patients haven't had their jabs recorded properly, so they are not showing up on the NHS app or medical records. And it is not known how many people have been affected.

One reader, who asked not to be named, had her booster jab at the clinic on May 21, but when she went to get her Covid pass to go on holiday she discovered that it was not appearing on her NHS app, nor on her medical records at the GP. And although she has a physical card with the date and serial number, she was told that it couldn't be used to trace records of the jab.

When she called the Covid helpline to try to find out what had happened, she was told that no vaccinations at all had been recorded that day from the centre, and she would have to contact them directly to get the situation resolved – not an easy task given that the centre closed on July 2 and isn't due to reopen again until September.

Her daughter, Kelly, took to the Shepton Mallet Community Group Facebook page to help her mum resolve the issue, and was then contacted by several other people who also discovered that their vaccinations had not been recorded either.

Another reader realised that her booster from June 18 hadn't been recorded either, when she tried to download her pass. She contacted the covid helpline which although helpful, told her she would need to wait for up to five days for someone to contact her – which would be cutting it very fine for her holiday. But after seeing Kelly's Facebook post, she was able to contact Shape directly. "They were quick to resolve the situation," she said. "They have amended my records and explained it should update on the app in a few days, and if it doesn't I can get back in touch with them."

But the NHS has denied that the problem is widespread, and have said that these are "isolated incidents."

Emma Webber, Covid Vaccinations Communications Lead for NHS Somerset said: "There were not any IT issues that the team are aware of. However, there are paper records held and these will be crossed checked, and any missing data will be manually inputted."

It is not known how long this will take however, but Ms Webber said she believed it would be "very quickly" although she was not able to confirm how many records would need to be cross-checked.

The patients who have contacted Shape Mendip, who ran the centre, have now been assured that their records have now been updated, but that it could take several days for it to show on the app.

Kelly said: "I'm just thankful my mum sorted her Covid pass in advance! If she just went on the app a couple of days before we wouldn't have the time to try and resolve the issue.

"They've tried to make out to us that this is a one off, but I have been contacted by other people who saw my Facebook post and are in the same situation, so it is definitely an issue."

Ms Webber said: "It's always a good idea to prepare and check all documents for passes and travel in advance. However these are, as far as I am aware, isolated incidents.

"Patients with any queries can email [email protected] ."

Have you discovered that your Covid jab wasn't recorded? Let us know by emailing [email protected]