Yet more early serif UDCs - Upper Clevedon, Pensford, Pilton, Curry-Rival, ...

Upper Clevedon's UDC was registered on 9th May 1843 and is known used from June 1843 to September 1850 in black, with a single example in yellow known from 1851.  The example below in black is relatively late usage from April 1850.

Pensford's UDC was not registered in the Steel Impression Book, but is known used from July 1843 to August 1850.  The two examples below are from January 1844 and July 1850.

Pilton's UDC was registered in the SIB on 3rd January 1844 and is known used from 1845 to August 1855.  the example below is from January 1852.

Curry-Rival's UDC was registered on 7th February 1844 and is known used in black from 1848 to February 1857 and in blue from August 1851 to January 1858.  The example in blue below is from June 1852.