A UFO expert says the latest reported sighting over a military base in Shropshire should be enough to prompt a formal inquiry into Britain's airspace security.

Nick Pope, who used to work for the Ministry of Defence's UFO project, has viewed recent footage filmed by a soldier at the Tern Hill barracks and said "it's all getting very interesting".

It follows a series of UFO sightings across Wales last week.

In one incident, a police helicopter was forced to swerve sharply as it was apparently 'buzzed' by a strange craft.

"This all started off with a near miss between an object and a police helicopter on June 8," Mr Pope said.

"Now it's transpired that at the same time there were other UFO sightings being reported around the country.

"This lends weight to the fact that there does seem to be something odd going on in our airspace."

Mr Pope said a formal inquiry should be launched by the MoD and the Civil Aviation Authority.

"All this clearly illustrate that there are flight safety issues," he said.

"I have seen three separate videos - all were interesting.

"The fact that this latest one was shot by military personnel shows the seriousness of this incident.

"The report from the soldiers will be on its way to Whitehall and the way forward now will be they (the MoD) should interviewing witnesses and examining civil and military radar."

He added that any hoax or mock-up by military personnel would be a disciplinary offence - and therefore less likely to happen.

"I've seen another video which showed a craft with a diameter of, I would estimate, several hundred metres, hanging silently over people's heads," he said.

"It was a clear breach of UK air security. So I think something is going on here."