The Wales international has agreed terms on a year-long deal to be worth more than £13million part of which will be financed by Real Madrid.
Bale is relishing the prospect of relaunching his career at the club that propelled him to stardom.
Tottenham is yet to make an official announcement but it will happen once a few minor contractual issues are signed.
Gareth Bale ready to revive his career
Bale’s return to North London, seven years after he was sold to Madrid for a world record fee of £90m.
He is now laced with sentiment but it was a move that Mourinho, felt was absolutely imperative following his side’s dismal 1-0 defeat by Everton last Sunday.
Mourinho was adamant that Tottenham needed Bale’s drive and dynamism to enliven Tottenham’s attack.
Negotiations therefore accelerated following discussion with Chairman Daniel Levy.
It is understood no players will go in the opposite direction.
Mourinho had been coy earlier in the day when quizzed on how close a deal was to bring Bale back to north London.
Gareth Bale became a fan favourite at Spurs where he scored 56 goals and provided 58 assists in 203 appearances.
In 2012-13 he was crowned Tottenham’s Player of the Year and also claimed the PFA Players’ Player of the Year.
He also won PFA Young Player of the Year, Football Writers’ Association Footballer of the Year and Premier League Player of the Season award.
Gareth Bale was the Premier League’s most impressive player and Real Madrid were aggressive in the transfer market.
They therefore brought him in to partner Cristiano Ronaldo at the Santiago Bernabeu.
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