Is it Sevenoaks, Kent.? There is a rare breeds place somewhere in Kent,https://www.rarebreeds.org.uk/find-us
perhaps they will have some leads.
There are also a few Facebook groups you could ask,https://www.facebook.com/groups/525138497593526/, there will probably a more local one.
Having had a go at shearing sheep, its hard work, but not impossible to do and if you can not find a reliable shearer I would invest in clippers, electric ones.