It was in December 2012. I don't have the exact date - it will take me some time to find it.
The proceeds were held up by the Israeli tax authorities, as they required proof (lots and lots of documentation) that I have never lived or worked in Israel. The HQ of the company I work for is in Israel, but I am British, and have never been there. I assume this doesn't affect your answer?
That explains the time lag between the date of disposal and the date you got the money. If you sold the shares in December 2012 then the disposal occurred in the 2012/13 tax year for UK tax purposes.