| | PR Agency Name | Location |  |  |  |  |
 | Mustard PR | .Opec House High Street, Bray,Maidenhead,Berkshire [Berkshire] [South East] [England] | | | | |
 | MWW Group | .Fox Court
14 Gray?s Inn Road
London
| |  |  | |
 | Myles Communication Group | .2 First Avenue Sherwood Rise, Nottingham Nottinghamshire NG7 6JL
| | | | |
 | Mypec Ltd | .The Old Pottery, 54b Fulneck, Pudsey [West Yorkshire] [North East] [England] | |  | | |
 | Myriad Public Relations | .16 Green La, Padgate, Warrington. [Cheshire] [North West] [England] | | | | |
 | Myriad Public Relations Ltd | .Myriad House Bartholomews Walk,Ely,Cambridgeshire [Cambridgeshire] [East Anglia] [England] | | | | |
 | N Chapple | .Bays Haven, Bosham Lane, Bosham, Chichester [West Sussex] [South East] [England] | | | | |
 | Nailhala Lasharia PR & Marketing | .28 Alexander Street, London [Greater London] [South East] [England] | | | | |
 | Naked Ape PR | .7C Balham Station Road [Greater London] [South East] [England] | |  | |  |
 | Naomi Hancock Communications Ltd | .38 Claverton Street, London.
| | | | |
 | Natural PR | . [West Sussex] [South East] [England] | |  | |  |
 | Natural Therapy Services | .45 High Street, Swanwick, Alfreton [Derbyshire] [East Midlands] [England] | | | | |
 | Naughton Media | .Balfour House Balfour Street, Consett,County Durham [Northumberland] [North East] [England] | | | | |
 | Nautilus PR | .
| |  | | |
 | NB Media Ltd | .Sybrig House, Ridge Way, Donibristle Ind Park,
Dalgety Bay, Fife, Dunfermline [Fife] [Fife] [Scotland] | |  | | |
 | NB Public Relations Ltd | .Royal Oak Ho Royal Oak Av, Bristol. [Bristol] [South West] [England] | |  | | |
 | NBPR | .3 Baker\'s Row,London
| |  | | |
 | NCI London | .Business Design Centre, 52 Upper Street, London [Greater London] [South East] [England] | | | | |
 | NDP Publicity Services | .NCH Building, Upper Bar, Newport, Shropshire [Shropshire] [West Midlands] [England] | |  | | |
 | Neesham Public Relations | .121 High Street Berkhamsted Hertfordshire [Hertfordshire] [South East] [England] | |  | |  |