Oh no, how awful
Found this on DEFRA website 'Guidance on Licensing and Training of Slaughtemen':
Operations which require a licence
The Regulations require anyone carrying out the following operations to have a provisional or a registered licence:
*The restraint of an animal for the purposes of stunning, slaughtering or killing
*The stunning, slaughter or killing of animals
*The pithing of stunned animals
*The assessment of effective stunning or killing
*The shackling or hoisting of stunned animals
*The bleeding of animals which are not dead
Exemptions
A licence is not required for the following operations:
*Emergency slaughter or killing, where the animal must be killed immediately
*Slaughter or killing by the owner of an animal for his private consumption (when slaughter takes place elsewhere than in a slaughterhouse or knacker's yard)
*Slaughter or killing for a non-commercial purpose ("commercial" is defined in the Regulations)
*Killing by using a free bullet in the field
*Neck dislocation or decapitation of poultry on agricultural premises where the birds were reared
*Operation of automatic equipment (where the operator does not carry out any task which would otherwise require a licence)
*Shackling birds before stunning
*Slaughter or killing under the direction of a veterinary surgeon
So, if it's just for domestic consumption, looks unlikely they'd need a licence.