Taking into account all the relevant factors the following Cherry varieties would be suitable pollinators.
AlbaluGroup ESelf-fertile A high quality Iranian acid cherry with strong cherry flavour excellent for jam and other culinary uses.
AmberGroup CSelf-sterile An old red on yellow cherry from Kent, very high quality, good balanced flavour.
Bigarreau GaucherGroup ESelf-sterile An excellent sweet black cherry with a rich flavour.
Black EltonGroup ESelf-sterile A very good black heart-shaped cherry. Very sweet and meaty/firm textured.
Elton HeartGroup CSelf-sterile A large heart shaped red on yellow cherry.
Emperor FrancisGroup DSelf-sterile Exceptional cherry. A dark red sweet cherry with a pleasingly soft buttery texture which tastes like fine tawny port.
FlorenceIn stockGroup ESelf-sterile A large heart-shaped red on yellow cherry.
Governor WoodGroup CSelf-sterile A large sweet yellow/red cherry
Kentish RedGroup DSelf-sterile A small red cherry once grown in many parts of Kent.
LapinsGroup DSelf-fertile Also known as Cherokee, this is very popular heavy cropping self-fertile sweet cherry.
May DukeGroup CPartially self-fertile A traditional red cooking cherry once widely grown in Kent.
Merton BigarreauGroup CSelf-sterile A firm fleshed delicious sweet black sweet cherry with white flesh. Very unusual.
MerchantGroup CSelf-sterile An excellent big cherry with a perfectly balanced flavour which melts in your mouth
Merton CraneGroup DSelf-sterile A high quality black sweet cherry.
Merton LateGroup ESelf-sterile A very well flavoured cherry, much like 'Amber'
Merton MarvelGroup CSelf-sterile A sweet cherry with meaty texture.
Merton PremierGroup CSelf-sterile A dark cherry, buttery yellow flesh, slightly acidic flavour