"signalled" is correct and usable in written English.
You can use it when you need the past tense or past participle of "signal". For example, "She signalled her approval with a nod of her head".
The prime minister, Tony Abbott, said the government was "carefully studying" the judgment to determine an appropriate response, but he strongly signalled his determination to find a way to ensure the chaplaincy program continued.
The Metropolitan police force has signalled that it is prepared to send officers abroad if necessary to investigate the abuse allegations.
That delivery, so angry and precise and limpid in its movement off the pitch, more than the ball that took out Clarke's off-stump, was the ball that signalled the end.
When it was put to him that those with intimate knowledge of the republican movement - former prisoners like McKearney and other dissident republican intellectuals - were convinced the IRA offer signalled the end of the war, the MP said: 'I'm sorry, who are they?
Riyadh has signalled in the past that it might seek nuclear warheads from its ally Pakistan if Tehran were to develop them.
Pop music has always been a prescient form – the Beatles signalled the coming of Harold Wilson's Labour government, punk the rise of Thatcherism, and Britpop soundtracked the birth of New Labour – so it seems appropriate that the rise of posh in pop culture should chime with the ascendancy of the current Tory leadership.
With the budget facing a profound backlash from voters, state premiers and the Senate crossbench, government ministers over the past few days have signalled some willingness to negotiate on a couple of the budget's highly contentious measures: the education changes and the medical co-payments.
Why that law would be ignored to bring terrorist-trained detainees into American cities has not been answered by this administration," McConnell said in a statement that signalled an early, sustained and thus-far successful fight to prevent the closure of Guantánamo Bay.
Facebook Twitter Google plus Share Share this post Facebook Twitter Google plus close 4.06pm BST16:06 Egypt has signalled it may be willing to amend a ceasefire proposal to accommodate Hamas, Reuters reports.
pic.twitter.com/hITmEgdxRl Updated at 1.07pm BST Facebook Twitter Google plus Share Share this post Facebook Twitter Google plus close 12.51pm BST12 51 Israel's prime minister, Binyamin Netanyahu, has signalled that the offensive against Gaza will intensify still further.
The genuine enthusiasm for the Queen's speech at Dublin Castle, which signalled a new era in Anglo-Irish relations, has been dampened today by news of the death of Dr Garret FitzGerald.
