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McLaren will have over ten new upgrades for this weekend's Spanish Grand Prix, the team's engineering director Tim Goss said on Wednesday.

The British squad is also planning to bring the updates it did not take to Istanbul after Goss felt they would not be fully reliable over a race distance.

"As usual the relentless pace of upgrades continues," said Goss during a Vodafone phone-in teleconference. "We have a package of upgrades which we're taking to Spain. It's a package of about 10-12 upgrades, some of which will be recognisable from the outside and some that won't be.

"Our objective is to win races and championships and to do that we have to close the gap on Red Bull. We just keep chipping away at the problem. We had a package for Turkey that we took there. We're always trying to accelerate getting upgrades to the circuit as quickly as possible.

"Just prior to Turkey we had a minor issue that meant I wasn't confident that the upgrade would be durable over a race distance. So we pulled out of that at the last minute. We'll reevaluate all of our issues on Friday in Spain."

Goss also conceded he would be surprised if the Spanish Grand Prix is not an entertaining race thanks to the new regulations, despite the Barcelona circuit being notoriously difficult for overtaking.

"It's made a dramatic difference to the races so far and undoubtedly most of us would be quite surprised if the Spanish Grand Prix is not different to previous events. Clearly it's not all down to the DRS and KERS hybrid. The tyres and tyre life plays a large part in creating the race spectacle we've all got.

"I think most of us would be surprised if Spain is not an entertaining race. Tyre wear and life will play a large part in that and DRS will help. One of the most encouraging things for me this season is that the overtakes are not just happening in the DRS zone.

"If that were just happening then it would be very predictable. It makes it more exciting for the spectators and hopefully that draws more viewers to the sport."