I checked numbers that i'd won money on to see what it came up with but the website came up with nothing, I kept trying as well with other winnings but nothing from the website, tried this over the period of a year with quite a few wins but no joy.
Strange but makes you wonder how many people try it that should have won something but get told they haven't or not recognised
It's not the premium bond number you need. Most people buy more than one, usually thousands.
When the bond(s) were purchased, you would have been issued a bearer number. This is the number required on the site.
IIRC, there are companies that will trace individual bond numbers (usually in sequence), for a small fee. They can be found in the national press ads.
more you put in more chance of winning i hold 5k worth, just sent a cheque off to top it up to 10k, then the summer hopefully another 10k to take it to the max, ill give them 1 year then use a high interest savings account... gotta give it a go havent ya.