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.
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.
Bradbourne BlackGroup FSelf-sterile An old black Kentish cherry.
Emperor FrancisIn stockGroup DSelf-sterile Exceptional cherry. A dark red sweet cherry with a pleasingly soft buttery texture which tastes like fine tawny port.
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.
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
NapoleonGroup DSelf-sterile A popular traditional white cherry once widely grown in Kent and known as 'Kent Nap'. Very crunchy and meaty/dry with mild richness and acidity.
NobleGroup FSelf-sterile A meaty and juicy cherry. Lovely complex flavour but not as rich in flavour as the best cherries
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.
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.
VegaIn stockGroup DSelf-sterile A high quality modern large red on yellow sweet cherry.