The Queen and the Duke of Edinburgh undertook several engagements, including visits to Valentines Park and Mansion, Waltham Forest, and Harrow.
Sometimes people ask me if the Queen ever takes her coat off (yes, sometimes) and if so, what happens to the brooch - well, here you go: it usually gets transferred to the dress underneath. (Unless you've stumbled across a time when she's actually got two brooches on, that is.)