22 March 2007 - 200th anniversary of the Abolition of the Slave Trade - PHQ Stamp Cards with special postmarks.
Commemorating the 200th anniverasry of the Slave Trade Act 1807.
The 1st class pair shows William Wilberforce (Freeman Street Birmingham postmark)
and Olaudah Equiano (Hull postmark)
the 50p pair Granville Sharp (Dean's Yard London postmark)
and Thomas Clarkson (Wisbech, Cambridgeshire postmark), and
the 72p pair Hannah More (different Hull postmark)
and Ignatius Sancho (Parliament Square, London SW1 postmark).