Midlothian SNP MP Owen Thompson has attacked the Ministry of Defence after it confirmed convoys of nuclear weapons travel through urban areas without displaying warning signs.
He first raised the issue following reports of at least two incidents when convoys were spotted near Penicuik, including one when the weapons were parked just yards from two schools.
Mr Thompson said: “If the UK government really thinks it is better for people not to know nuclear material is being driven on motorways and through city centres then that is simply untenable.
“To pull the wool over people’s eyes about the awful practice of nuclear convoys through our towns and cities, by not even owning up to what is on those trucks is unacceptable.
“The MoD can be assured I will be raising this again – this practice has to be stopped.”
Last month Mr Thompson received the backing of Westminster over calls to halt nuclear convoys through Scotland’s streets.
He welcomed the decision in the House of Commons to give a second reading to his parliamentary Bill which would stop weapons of mass destruction being transported through Scottish streets.
Mr Thompson’s Bill is due to receive its second reading in the House of Commons on March 4.