In the fighting, a police armoured vehicle was set on fire but the occupants managed to escape.
Lt Guy Disney lost his lower leg after a rocket-propelled grenade attack on his armoured vehicle in Helmand.
One current example is a British-American project to build a new armoured vehicle capable of very sophisticated reconnaissance.
Anti-Americanism has grown strongly since two South Korean schoolgirls were killed by an armoured vehicle operated by two American soldiers.
The BBC's defence correspondent, Caroline Wyatt, said the Mastiff armoured vehicle has long been deemed one of the safest of all armoured vehicles.
Sgt Lee Davidson, 32, from Thorne, Doncaster, died after his armoured vehicle hit a roadside bomb in the Nahr-e Saraj district of Helmand.
The father-of-two, 32, from Doncaster in South Yorkshire, died after his armoured vehicle hit a roadside bomb in the Nahr-e Saraj district of Helmand.
The soldiers who were killed on Thursday had left their Warrior armoured vehicle in the south-east of Basra when an improvised explosive device was detonated.
The three soldiers died after their Mastiff armoured vehicle was hit by a roadside bomb in the Nahr-e Saraj district of Helmand province in Afghanistan on Tuesday.
The two men were on patrol in a Jackal armoured vehicle attempting to prevent insurgent activity when they were killed by a roadside bomb planted by the Taliban.
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It comes after three British soldiers were killed when their Mastiff armoured vehicle was hit by a roadside bomb in the Nahr-e Saraj district of Helmand province on Tuesday.
Pte Barber, of 2nd Battalion, was killed in Basra, Iraq, a year earlier after he was hit by a ricocheting bullet while he drove a Warrior armoured vehicle during a night operation.
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The key intelligence capability once provided by the Nimrod R1 will not be replaced for some years, while other potential gaps include a coherent future armoured vehicle programme to replace the current variants being used in Afghanistan.
Cpl William Savage and Fusilier Samuel Flint, of the Royal Highland Fusiliers, the 2nd Battalion The Royal Regiment Of Scotland, and Pte Robert Hetherington, of the 51st Highland, 7th Battalion, a Territorial Army member, died after their armoured vehicle was hit by a roadside bomb.
"We welcome the announcement by the secretary of state for defence confirming that the SV (specialist vehicle) programme is secure in the MoD's future AFV (armoured fighting vehicle) pipeline and core programme of committed funding, " said Dr Sandy Wilson, president and managing director of General Dynamics UK, the prime contractor on the programme.
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The wild card in Europe's biggest armoured-vehicle programme is French rather than German.
The firm has blamed the cuts on a decline in workload on the Ministry of Defence's Armoured Fighting Vehicle programmes.
The company is building four different variants of new armoured fighting vehicle which will replace the ageing SVRT vehicle and provide troops, it is said, with more protection and firepower.
BBC: General Dynamics: British Army deal secures Oakdale jobs
The vehicle is considered one of the safest armoured vehicles in use by the British Army.
Rebels opened fire on an armoured car carrying aid workers and burnt out a second vehicle on a main lakeside road south of Bujumbura, humanitarian staff said on Thursday.
Once inside, they can climb into an old police armoured car and watch footage, shot from just such a vehicle, of a township riot.
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