Deputy Prime Minister Nick Clegg also paid tribute, saying: "Our thoughts are with the families and friends of the five service personnel who have so tragically lost their lives.
"This incident is a very sad reminder of the vital but dangerous job that our Armed Forces are doing every day to bring security to the people of Afghanistan.
"I would like to pay tribute to their service and to the ultimate sacrifice made by those who died yesterday."
More top news
Students will be able to secure a degree within two years instead of three but the cost could be as much as £13,500 a year.
The party know their breakthrough in the North of England may be a longer-term project than originally thought.
The number of dead includes 35 civilians, according to reports.