The whistler has survived the first cut from 12 officiating teams to eight, and will be the fourth official at Saturday's quarter-final tie between Spain and France in Donetsk.

Thomson, who has already refereed two fixtures, will be joined by Alasdair Ross as fifth official, and Scotland's refereeing team will find out if they are required for any further games after the completion of the quarter-finals.

Meanwhile, Uefa referees' chief Pierluigi Collina leapt to the defence of the additional assistant referee experiment after Fifa president Sepp Blatter declared Ukraine's defeat to England made goal-line technology "a necessity".

The co-hosts were denied an equaliser in the 1-0 loss in Donetsk when officials failed to spot Marko Devic's shot had crossed the line.

Collina, once widely regarded as the world's best referee, claimed the mistake was the first failure in "thousands of matches" in which five officials had been used.

"This is the only problem we have had. It's one negative decision in three years of Champions League and two years of Europa League and 24 matches in the Euro."

The decision left Uefa president Michel Platini red-faced after he made bold claims on the eve of the game about the effectiveness of five officials. He said: "With five, officials see everything."

Fifa are expected to approve at least one of two systems which have been subject to in-depth testing when they meet in Zurich four days after the July 1 final.

One of either Hawk-Eye or GoalRef may be introduced for the first time at December's Fifa Club World Cup in Japan.