Oadby and Wigston Borough Council
Ofcom
Ofcom England North
Ofcom Northern Ireland and Isle of Man
Ofcom Scotland
Ofcom Spectrum Management Office - England South
Ofcom Wales
Office for National Statistics - (Multiple Offices)
Office for Standards in Education - (Multiple Offices)
Office of Fair Trading
Office of Gas and Electricity Markets/Gas and Electricity Markets Authority
Office of Government Commerce - (Multiple Offices)
Office of Rail Regulation
Office of Science and Technology
Office of the Judge Advocate General
Office of the Leader of the House of Commons
Office of Water Services - (Multiple Offices)
Ofgem
OGCbuying.solutions
Oldham Metropolitan Borough Council
Omagh District Council
One NorthEast - (Multiple Offices)
Ordnance Survey - (Multiple Offices)
Orkney Islands Council
Oswestry Borough Council
Oxford City Council - (Multiple Offices)
Oxfordshire County Council - (Multiple Offices)