An eighth person has been held in Australia as part of the investigation into car bombing attempts in Glasgow and London.Australian Federal Police and Queensland Police confirmed a man was arrested at Brisbane Airport. Searches have been carried out at the Gold Coast Hospital, in Southport, Queensland, where the 27-year-old registrar worked.The arrest is in relation to attempted car bombings outside a nightclub in the West End of London on Friday and an attack almost 36 hours later on Glasgow Airport, when two men drove a blazing Cherokee Jeep into its entrance.Meanwhile, a controlled explosion has been carried out on a suspicious vehicle parked outside Forth Street Mosque in the Pollokshields area of Glasgow.On Monday, Home Secretary Jacqui Smith told the Commons that 19 UK addresses have been searched as part of the inquiry into a suspected al-Qaeda cell.They include the Newcastle-under-Lyme home of Dr Mohammed Asha, who was arrested with his wife on the M6 in Cheshire on Saturday night. He trained in Jordan and worked at North Staffordshire Hospital in Stoke-on-Trent.A house in Priam Close, Bradwell, with links to Dr Asha was also searched.In Scotland, police searched a property in Houston rented by one of the men in the Jeep, an Iraqi doctor called Bilal Abdulla who worked at the Royal Alexander Hospital in Paisley.The driver of the vehicle sustained serious burns to his body and is in a critical condition at the hospital where he remains under armed guard. Police carried out several controlled explosions at the hospital while staff accommodation was also searched.On Sunday, police raided a property in Ramilies Road, Liverpool, off Penny Lane, following the arrest of a fifth suspect, a 26-year-old man, in the Lime Street area of the city on Saturday.© Independent Television News Limited 2007. All rights reserved.