Party leaders campaign across the UK ahead of Thursday's election

From the debate stage to the soccer field, British Prime Miniser Boris Johnson played goalie on Saturday (December 7)

in the last weekend of campaigning before Thursday's general election.

Johnson was pledging an investment of 550 million pounds ($706 million) in grassroots soccer, as part of plans for a bid to host the 2030 World Cup if his Conservative Party wins next week's election.

The Prime Minister also fielded questions over a recent leak of classified UK-U.S. trade documents on the internet -- which Labour published last month.

(SOUNDBITE) (English) BRITISH PRIME MINISTER, BORIS JOHNSON, AFTER BEING ASKED WHETHER HE WAS CONCERNED THAT RUSSIA COULD BE INTERFERING WITH THE GENERAL ELECTION, SAYING:

"I do think we need to get to the bottom of that. As far as I'm aware we haven't established the truth about that. But, what I certainly think is that document, whatever it was intended to prove, did not prove what Jeremy Corbyn and the Labour party hoped that it would prove and it was, I'm afraid, just another distraction from the void and the heart of Labour's policy on Brexit."

Meantime, Labour leader Jeremy Corbyn was also pressed on the issue- as he donned his apron at a local bakery in Wales.

(SOUNDBITE) (English) LABOUR PARTY LEADER, JEREMY CORBYN, SAYING:

"We obtained those documents. We believe those documents to be correct and nobody until yesterday has denied the correctness of those documents. The issue is there should be no interference in British politics by anybody else. The Prime Minister has answers to give, which he refuses to do about Russian to the Tory party or the report that he is sitting on about Russian interference in British politics. Of course there should be no interference in our British political system by Donald Trump or the Russians.

British minister Nicky Morgan said on Saturday the documents has all the hallmarks of a Russian attempt to interfere in Britain's upcoming election

Polling suggests the Conservative party is well ahead of Labour.

A Panelbase survey on Friday (December 6) showed the Conservatives extending their lead slightly over the opposition party to nine points, up from eight a week ago.