Birmingham MPs are threatening to rebel against " halfbaked" plans to ban smoking in selected pubs.
Clare Short (Lab Ladywood) and Lynne Jones (Lab Selly Oak) are among MPs demanding "a complete and total ban on smoking in pubs, restaurants and public buildings". Rebels claim they have the support of up to 50 Labour MPs - enough to wipe out Tony Blair's majority.
Controversial legislation banning smoking in all enclosed public places which serve food will be debated by MPs in the Commons today.
The proposals, unveiled by Health Secretary Patricia Hewitt last month, will still allow smoking in pubs where food is not sold.
The compromise, following the intervention of Defence Secretary John Reid, came as a disappointment to those MPs who had been calling for complete prohibition.
Ms Short and Dr Jones are among 81 MPs from all parties who have signed a House of Commons motion criticising the Government.
It warned: "Any compromise or fudging of this issue by so-called smoke zones will be a recipe for confusion, ambiguity and unnecessary argument and excuses by those not wishing to adhere to both the spirit and letter of the law."