Main period sans-serif 25mm UDCs under Wellington

There were 12 offices under Wellington that were issued with main period UDCs.

Brompton-Ralph's UDC was issued on 6th March 1852.  Usage is known in blue from December 1852 to July 1854, and in black from November 1857 to February 1859.  The example below in blue is from December 1853, just two days after the earliest known usage.

Huish-Champflower had its UDC issued on 10th April 1852, after a mispelt UDC ("HEWISH-CHAMPFLOWER") was issued on 6th March.  It is known used in blue from April 1852 to August 1854, and in black in March 1858.  The example below in blue is from August 1852.

Milverton had its UDC issued on 21st December 1844.  It is known used in black from December 1844 to June 1852 and in blue from January 1850 to July 1852.  The example below is from January 1846.  Milverton at this stage had a numeric obliterator ("862") but would appear to still be under Wellington as witnessed by the dated handstamp on the reverse.