The following organisations run accredited food hygiene courses and may be able to provide further details of courses/trainers in your area (including courses in other languages):
RCTCBC Catering Services
Telephone: 01443 281470
School catering quality and training webpage
Royal Society for Public Health
Telephone: 020 7265 7300
Website: www.rsph.org.uk
Highfields Limited
Telephone: 0845 2260350 / 01302 363277
Website: http://www.highfield.co.uk