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- M and J Ballantyne Ltd
- Maitland-Carew, E
- Marchmont Farms Ltd
- Martin, Brian
- Martin, Connie
- Maxwell, D
- McAree, Simon
- McCall, Linda
- McDevitt, John
- McDonald, Alister
- McDonald, R A
- McGuigan, W M
- Midlothian Council
- Millar, F
- Miller Homes
- Minto Hills Conservation Group
- Mobile Operators Association
- Morrison, N D
- Murray and Burrell Ltd