Could you explain this a bit further for those not in the UK forces ?
"and the US allowed operations from Wideawake."
Wideawake airfield is on Ascension Island and though the island is a British territory, the airfield at the time of the Falkland’s war was operated by USAF. After the Invasion of the Falklands, this of course happened.
The question is would the Argies have backed down if a couple of hundred Paras and some weapons bigger than a 84mm Carl Gustav suddenly appeared on the Falklands the day before they intended to invade because a Belfast or two with Victor tanker support had been able to get them down there (with of course the British government advertising the fact).