Last week Stamp Magazine reported an example of a Doctor Who stamp used already - see their news here.
We made our own enquiries and can show another example used on a newspaper competition entry - again the date is not clear but ours seems to be 27 February, and the location 'Home Counties North'.
This is quite remarkable. Either the Post Office branch had no other 1st class stamps to sell (which is unlikely) or they misunderstood the release date.
The story was picked up by a German Philatelic magazine. And they've acknowledged the source.
904. India Post's Rapid Descent Into Excess. - 🇱🇰 *Sri Lanka Post *has released 3 new issues since the beginning of the year - each a single stamp issue. 5 January - Golden Jubilee of the Sri Lank...