2559: Platinum upgrade – solution

The perimeter, starting at square 38, yields six of the CITIES created to commemorate the Platinum Jubilee: DONCASTER, MILTON KEYNES, BANGOR, WREXHAM, DUNFERMLINE and DOUGLAS. STANLEY and COLCHESTER are the unclued lights. PORT (Stanley) had to be highlighted at 23 Across.

First prize Gail Petrie, Brean, Somerset

Runners-up Keith Williamson, Cambridge; Bill Ellison, Caversham, Berkshire