Same wordpress site on 2 different computers

New site http://www.junieandjack.co.uk 3.9.1 works fine at home on my laptop bith front and backend.

In the office I struggle to navigate! Just grinds to a halt.. if I stop the page loading and press reload it loads ok but then the next page does the same..

All other sites in the office are fast. 17mb download speed..

Any pointers would be helpful as it is driving me mad!