Silver Cloak
From Tardis Wiki, the free Doctor Who reference
The Silver Cloak was a group of old pensioners that was set up for the purpose to find the Doctor. The group was created by Wilfred Mott, who started the group to find the Doctor believing him to help his granddaughter Donna remember her past with the Doctor so she could continue travelling with him.
The group consisted of many members, the most notable members where: