Bullets found in the home of a former A&E consultant had been altered to cause maximum damage, a trial has heard.

The High Court in Glasgow heard how submachine guns found at Dr Martin Watt's house in Cumbernauld had been reactivated to fire live bullets.

Julie Bilsland, a forensic scientist with Police Scotland told the court how she had examined guns and ammunition taken from the property in May 2017.

Some of the ammunition had been drilled to create hollow point rounds, designed to spread on impact and cause maximum damage.

Jurors were then told that powder found at Watt's house had been analysed as low grade black powder, gunpowder which was probably homemade.

They had earlier heard how police seized 1500 rounds of ammunition along with three Skorpion submachine guns and two pistols from the house.

Constable Jamie Routledge told the court a laptop taken from Watt's home was found to contain more than 600 pictures of guns, silencers, ammunition and homemade bombs.

The laptop's browsing history included searches about storing gunpowder, making detonators from mobile phones, and using phone numbers to find people's addresses.

Other searches included how to make a rifle silencer, how to break someone's neck, and disguises, make up and false beards.

The trial also heard an envelope was found at the house with "bad guys" written on it.

Prosecutors told the jury it contained details of individuals involved in disciplinary proceedings against Watt while he was an A&E consultant at Monklands hospital in Airdrie.

One of them, Dr Alison Graham of NHS Lanarkshire, was asked why Watt would have a photograph of her on his computer.

"I have no idea," she replied.

Watt's defence has tendered pleas of guilty to a string of charges of possessing various firearms, including the submachine guns and two pistols.

He denies the remaining charge of using submachine guns and pistols "with intent by means thereof to endanger life" between March 2013 and May 2017 and the trial continues.