It was like a scene from Dad's Army when Army bomb disposal experts found wartime explosives made by the Home Guard in makeshift bottles.

A team was called to the Blacksole Bridge in Herne Bay after the wartime bombs were found.

The team from the Royal Logistics Corps set up a 30 metre exclusion zone for pedestrians around the railway embankment after the suspected homemade phosphorous bombs were found.

It is believed the former farm site used to be the the home for volunteers of the Home Guard during the Second World War, who guarded the bridge over the railway.

The Home Guard made their own phosphorous bombs in glass bottles to ward off Nazi invaders - which were designed to ignite upon exposure to air.

The site is being developed by contractors as part of the new Sainsbury’s at the Altira Business Park, with workers carrying out surveys and ground tests.

One worker at the site said: “On Sunday the fire brigade came out after some old devices were found and they made it safe.

“But then last night some new devices were found fully intact, so the army crews have been here since.”

The army lorry parked up at the site, and a hoist was put in place while an expert in black overalls and mask removed the two devices. Smoke was rising from the land around his feet.

Another worker said: “I’ve been told they are old phosphorous bombs which the Home Guard would throw at the enemy. They found two of them this morning or late last night.

“The farm used to be a Home Guard station to protect the bridge during the war. When it finished these might have been left behind.”

A spokesman for the Ministry of Defence confirmed that a team from the Shorncliffe Barracks in Folkestone had attended the scene as part of a routine job.

He said: “Investigations are ongoing, and the team will carry on the appropriate procedures to make the area safe. The team will stay there until the incident is appropriately managed.”

The new footbridge will connect the new Sainsbury's store with Mickleburgh Hill, and will bring and end to pedestrians having to walk in the roadbridge where there is no footpath.

It is expected to be completed by spring next year. Meanwhile work on the new 32,000 sq ft superstore also began last week.