In an exclusive interview, the left-wing shadow cabinet minister discusses his new role as a senior adviser to Ed Miliband.
Powell is named vice chair of the election campaign with left-winger Trickett made a senior adviser.
Six months away from the general election, Labour is struggling to convince the country that it has the authority to govern – and its MPs are becoming ever more despondent.
Jason Cowley on the struggles and woes of the Labour leader.
How did the Labour party lose support, and where have its votes gone?
Former Scottish Labour deputy leader Anas Sarwar is expected to join Miliband's team.
Farage's party badly defeated after attempting to exploit Rotherham child abuse scandal.
"I will fight with you with every fibre of my being over these months to show how we can change Scotland," says the Labour leader.
The shadow cabinet is likely his next stop.
"The folk who say you can only do this from the left aren't following the lessons of recent Scottish electoral history," says the Scottish Labour leadership frontrunner.