The mytravel site lists Rochdale as head office. So a quick look at 192.com for Rochdale gives

MYTRAVEL HEAD OFFICE SANDBROOK PARK SANDBROOK WAY ROCHDALE LANCASHIRE OL111SA  01706 742 000 
Business Directory
We have searched within a 25 mile radius of Rochdale
see more results → 1 - 5 of 18 results  new search

MYTRAVEL 73 YORKSHIRE STREET ROCHDALE LANCASHIRE OL161DB  Travel Agents, 01706 632 002 
MYTRAVEL U K LTD HOLIDAY HOUSE SANDBROOK PARK SANDBROOK WAY ROCHDALE LANCASHIRE OL111SA
Investment Holding Company for a group engaged as tour operators, distance from Rochdale: 1.10 miles  0161 232 0066 
MYTRAVEL GROUP PLC HOLIDAY HOUSE SANDBROOK PARK SANDBROOK WAY ROCHDALE LANCASHIRE OL111SA
Passenger Travel Services,   01706 745 818
MYTRAVEL GROUP PLC HOLCOMBE ROAD ROSSENDALE LANCASHIRE BB4 4NB   01706 240 033
MYTRAVEL 50 ARNDALE CENTRE MANCHESTER M4 2HU   0161 865 2505