Laboratories in Leeds, West Yorkshire
| Name & Address | Phone # | Website |
| Andarik Q C Cross Park House, Leeds, West Yorkshire LS19 6HB | 0113-250 5691 |  |
| C R E H Analytical Ltd Hoyland House, Leeds, West Yorkshire LS18 4RU | 0113-281 9849 |  |
| D J Optics Cross Park House, Leeds, West Yorkshire LS19 6HB | 0113-250 8822 | |
| Mushroom Advice & Analysis The Granary, Leeds, West Yorkshire LS25 5AG | 01977 680248 | |
