Fast & Furious 6 began in May 2013 with £8.72m, just ahead of the Fast & Furious 8 opening weekend number, and achieved with lower ticket prices.
Fast & Furious 7 kicked off in April 2015 with £12.77m (compared to £8.65m for the latest film, if previews are ignored).
Growth is coming from territories such as China, where Fast & Furious 8 opened with an immense $190m.
It is only the middle of April, but the official summer blockbuster season launched at the weekend, with the screeching of Fast & Furious 8 into 572 cinemas nationwide.