score:4
Yes, you can earn with partners of the alliance (you'll find the complete list here: http://www.britishairways.com/en-gb/executive-club/tiers-and-benefits/about-tier-points). However, you have to distinguish Avios and Tier points. You can use the calculator at http://www.britishairways.com/travel/flight-calculator/public/en_gb to calculate the exact amount of points.