Shinamae
I bought £350 worth of premium bonds about a year ago but have never checked because I thought you were contacted if you won, is that not right?
They only contact you when you win the million. They used to have a ‘Mr Millionaire’ come to your house, but I think that may of changed now due to covid.
The app is available to download and it is easy to use once you have registered. This will tell you how much you have won that month.
Also, they will send you an email around the end of the first week of a new month to let you know.
Then, if you’re lucky, have the money transferred to your bank account or wait for a cheque or even have the winnings turned into more bonds (if you have less than 50,000 invested, that is).