Either Robert Eden Duncombe Shafto (1776-1848) or his son Robert Duncombe Shafto (1796-1888), Neither were Members of Parliament at the relevant time. Nor were any member of the Vane (or Vane-Tempest) family (i) The "members" who "ne'er shall be forgot" were presumably other MPs.
Reference:
(i) www.historyofparliamentonline.org/research/members/members-1820-1832