Bracelet Identification

Hi, can anyone help with the marking on this bracelet? Pretty sure it’s English, but not where it’s made or the year. Thank you.

This looks like a London hallmark for 1976. Unfortunately you have made the common mistake, when taking your picture, of thinking that bigger and closer is better when you could have backed off a little and actually got the marks in focus. The sponsor’s mark looks like IO (?). This is not known to me.

Phil