The competition between Dublin's leading estate agents has been turned up a notch following yesterday's launch by Hamilton Osborne King of a new residential division. The agency is rebranding its operation and moving to a new headquarters close to the Mansion House in Dawson Street. HOK Residential will look after country house sales, fine art, residential lettings and resales and will be headed up by Wade Wise, who has over 20 years experience in the UK. HOK MD Aidan O'Hogan hosted a champagne reception in the smart new premises, which will be further enhanced by the completion of a new office block next door. Guests arriving at yesterday's function had to squeeze past the Lord Mayor's official car (OO-D-1) which was parked in the middle of the footpath. And where were the clampers . . .