| Mark Bailey | York | — | — | Open → |
| MARK BLACKBURN | — | — | — | Open → |
| MARK BUILDER HB BUILDERS | — | — | — | Open → |
| Mark Byrne | Doncaster | — | 01777817405 | Open → |
| Mark Craven | — | mark@newsourcefinance.co.uk | — | Open → |
| MARK ELSOM | — | — | — | Open → |
| MARK FRITZ MS MEAR MS J SARGENT | — | — | — | Open → |
| MARK GILES | — | — | — | Open → |
| MARK GILES | — | — | — | Open → |
| MARK GILES | — | — | — | Open → |
| MARK GILES | — | — | — | Open → |
| Mark Harrison & Zoe Irving | York | — | — | Open → |
| Mark McCracken & Petia Lingova-McCracken | Brough | — | — | Open → |
| MARK NEWTON | — | — | — | Open → |
| Mark Oldridge | York | — | — | Open → |
| Mark Reeves | Wakefield | — | 079308422905 | Open → |
| Mark Silkstone | Leeds | marc@mps-electrical.com | — | Open → |
| MARK SYKES | — | — | — | Open → |
| Mark Tabert RIBA | York | — | 01904620127 | Open → |
| Mark Thompson | Leeds | — | — | Open → |
| Mark Toole & Natalie Allock | Goole | nataliesummers3@hotmail.com | — | Open → |
| MARK WHIPPEY | — | — | — | Open → |
| Mark Woods | Sheffield | — | — | Open → |
| MARKET WEIGHTON MOWERS LTD | — | — | — | Open → |
| Market Weighton Town Council | Sancton | — | — | Open → |