Bomb experts and weapons specialists were called to a house where a cache of weapons and ammunition was found.

Hertfordshire Constabulary said a “substantial amount” of firearms and potential explosives had been discovered by the relative of a person at an address in Adrian Road, Abbots Langley, yesterday afternoon.

A bomb disposal unit and team specialising in Chemical, Biological, Radiological and Nuclear (CBRN) defence were called to the scene where soldiers worked to clear the house and secure the area.

Hertfordshire Fire and Rescue Service were also called as a precaution.

Weapons specialists are also searching a garage in nearby Langley Road.

Police said the homeowner in Adrian Road is a licensed firearms holder.

One neighbour who did not want to be named said: “The road has been full since yesterday with vans coming and going.

“I am astounded, I can’t believe this happened in Abbots Langley. I have lived here a long time and had absolutely no idea this was happening on this road.

“It worries me if these things are live in the middle of a housing area. You never know what is happening behind closed doors.

“I am just glad they found them before there was a nasty accident.”

Bret Dunham, who lives on Adrian Road, added: “I am in and out quite a lot and every time I left the house there were police vehicles moving about.

“A bomb disposal unit was parked in the middle of the road and men in army fatigues. I was a bit worried because this doesn’t happen in Abbots.”

Abbots Langley Neighbourhood Sergeant Chris Simmons said: “We understand this may cause concern to local residents seeing so many officers, including the Explosive Ordinance Company and Chemical, Biological, Radiological and Nuclear defence, but there is no need to be alarmed.

“We are dealing with this with specialist officers for the safety of residents. Please bear with us as it will take some time to clear until we are happy that all the weapons and ammunition are safe and accounted for.”