By Dave Snelling A big update has just been rolled out by WhatsApp in the UK which means millions more Android and iPhone owners can now officially access and use this popular chat app. The changes, which have just been applied to British app stores including those run by Apple and Google, mean the minimum age for downloading and signing up for a WhatsApp account has been dropped from 16 to 13. This brings things into line with other parts of the world where 13 has been the minimum age for some time. The team at Meta, the parent company of WhatsApp, say it made the change to “ensure a consiste…