Anthony advised British Gas on the relocation of their Cardiff headquarters to No 4 Callaghan Square.  Comprising 68,335 sq ft of modern Grade A office space, the building offered the best quality city centre accommodation available.  The Tenant took a new 15 year lease with a 10 year break at a headline rent of £17.50 per sq ft and received a 14 month rent free period with a staggered handover.  Anthony also advised British Gas on the simultaneous sale of their previous headquarters at Helmont House, Cardiff comprising 150,000 sq ft to Rightacres.