Prior to the ban, publicans around the country were bracing themselves for a sharp downturn in profits, something that so far has failed to materialise.

Owners do not think this honeymoon period will last though, believing that landlords are in for a rough ride in the coming months.

Rex Andrew, landlord of the Robin Hood, Spalding, said: "There's not been much effect at the moment. The weather has been poor but not cold. Come winter people may be more reluctant to sit outside.

"Not many may want to go and sit out in the cold to smoke so business could suffer then, but generally people are handling the ban fine. I haven't seen anyone smoke inside."

Nick Williams, landlord of the Horse and Groom in Holbeach, said: "Things are the same right now but in winter it will be a different kettle of fish, even with covered smoking areas and outdoor heaters it will be very cold."

One establishment that is confident the smoking ban has been good for business is the Regent Bingo Club in Westlode Street.

Marcus Druce, the club's assistant manager, said: "Before the ban came in we were chewing our nails down to the quick, but over the last month things have been buoyant.

"Our admissions are quite similar but we have taken on a lot more new customers. I think people are enjoying the smoke-free atmosphere."

Sgt Brotherton, of Lincolnshire Police, admits there have been a couple of glitches but otherwise things have gone well, saying: "The public response has been excellent and I think this is down to the good management of the licensees.

"We had a few problems with people smoking and bringing glasses outside of Shooters bar but we are satisfied it will be sorted out."

Rick Weston, owner of Shooters in Market Place, Spalding, said: "We provide plenty of space outside for our customers to go and smoke and there's no need for them to bring glasses or bottles outside.

"Anybody who tries it will physically not be allowed.

"There's been a small effect on our business but people are still coming out and I think they are accepting the law."