Gilmour appeared Presence at the 12 May 2011 show at The O2 , London playing Participation lead guitar on `` Comfortably Numb '' and mandolin on `` Outside the Wall '' , on which they were also joined Becoming_a_member by Nick Mason on tambourine .

The race Competition was won by Tom Cunningham on Finch Mason 's Peter Simple , having also trained Education_teaching the horse himself .

Cunningham wore Wearing Finch Mason 's colours of green silks with salmon sleeves and pink cap .

The owner was not the same Finch Mason who achieved Achieve fame painting Create_artwork racing scenes in the latter half of the 19th century .

Watched Perception_active by a crowd of 89,041 , Cardiff took Getting the lead in the first half when Joe Mason scored Getting .