Hi Neil,
Thanks for your response. They don't comply and I've recommended that they be replaced by certificated fire doorsets. There are predominately glass doorsets available which comply with current regulations. The glazing is held in a metal frame and have the intumescent strips and cold smoke seals fitted.
Upon further investigation, it would seem that the building has recently been completely refurbished and I suspect the the tenants have been allowed to chose the entrance doorset to their particular premises - with no thought as to whether they are suitable or even consulting Building Control. Some tenants traditional timber doorset comply, but the few glass doorsets obviously do not.