The prosecutor has told the jury that they must decide whether the two defendants are part of a wider conspiracy to "rob and kill Joss Stone".
"This case is about a decision by a group of individuals, of which these defendants are two," Simon Morgan QC said. "Your job will be to determine whether you think these two are part of a plot."
He said that an "offence is committed as soon as the agreement is reached," and that the two defendants acted on the plan.
"They got a car, they collected their weapons of choice, and they made their way from Manchester to a short distance from Joss Stone's house," he said.
More top news
Record crowds are at this year's Pride in London parade as people show their support for the LGBT community after the Orlando shooting
After a showery start to the day, parts of Northern Ireland, western Scotland and south-west England will see drier conditions.
England have beaten Australia 44-40 in the third Test in Sydney to seal a 3-0 series victory.