Taking into account all the relevant factors the following Cherry varieties would be suitable pollinators.
AlbaluIn stockGroup ESelf-fertile A high quality Iranian acid cherry with strong cherry flavour excellent for jam and other culinary uses.
AmberGroup CSelf-sterile An excellent old red on yellow cherry from Kent, very high quality, perfectly balanced rich flavour.
Bigarreau GaucherGroup ESelf-sterile An excellent sweet black cherry with a rich flavour and juicy texture
Black EltonIn stockGroup 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.
FlorenceGroup ESelf-sterile A large heart-shaped red on yellow cherry.
Governor WoodIn stockGroup CSelf-sterile A large sweet buttery yellow/red cherry.
Kentish RedIn stockGroup DSelf-sterile A small red cherry once grown in many parts of Kent.
LapinsIn stockGroup DSelf-fertile Also known as Cherokee, this is very popular heavy cropping self-fertile sweet cherry. A late cherry with with dry/meaty texture and mild sweet flavour.
May DukeGroup CPartially self-fertile A traditional red cooking cherry once widely grown in Kent.
Merton BigarreauIn stockGroup CSelf-sterile A delicious sweet dark red sweet cherry with white flesh. Very unusual.
MerchantIn stockGroup CSelf-sterile An excellent giant cherry with a perfectly balanced rich flavour which melts in your mouth
Merton CraneGroup DSelf-sterile A high quality black sweet cherry.
Merton LateIn stockGroup ESelf-sterile A very well flavoured red/yellow cherry, much like 'Amber'
Merton RewardGroup DSelf-sterile A dry cherry with a distinct bitter cherry flavour.
MontmorencyGroup ESelf-fertile A high quality culinary cherry very popular in America for cherry pies and jams.
MorelloIn stockGroup ESelf-fertile The best known and most widely grown of the acid cherries in the UK.
NabellaGroup ESelf-fertile A high quality acid culinary cherry excellent for jams and pies
PennyIn stockGroup DSelf-sterile A modern cherry raised at East Malling in Kent. Big, meaty and dry. Can develop a rich/acidic flavour when fully ripe.
RoundelIn stockGroup CSelf-sterile A dark red heart shaped cherry once grown in Kent. Very buttery 'melts in mouth'. Flavour becomes very rich and sweet when fully ripe.
StellaIn stockGroup DSelf-fertile The most popular sweet cherry in the UK. Self-fertile and reliable cropper.
Summer SunGroup DPartially self-fertile An excellent sweet cherry with good frost tolerance particularly suitable for colder locations.
SunburstIn stockGroup DSelf-fertile A heavy cropping self fertile cherry producing large sweet almost dark red cherries. The flesh is meaty and slightly juicy and has a light rich/sweet flavour
Turkish BlackGroup ESelf-sterile A small, sweet juicy cherry. Medium richness. Some bite otherwise lacking impact because it's small and does not have enough flesh.
VanGroup CSelf-sterile A round dark red cherry with firm sweet flesh.
VegaIn stockGroup DSelf-sterile A high quality modern large red on yellow sweet cherry.
WhiteheartIn stockGroup CSelf-sterile A very sweet yellow cherry with a soft buttery texture. Tastes like a honeydew melon.