Thanks! Yup, the backmarkers, especially Yuki, impeding Lando made it possible for Perez to catch up. I have read on Reddit that Yuki ignored like 17 blue flags and 3 requests from his engineer before letting Lando through. He let Perez through after 5 blue flags and 1 request. The standard is supposed to be 3 flags and maybe one request. Drivers have been penalised in the past for ignoring the standard.

Some are seeing a conspiracy here (it’s Reddit after all) but I think it was just Yuki’s inexperience. He’s very obstinate and difficult to manage. Don’t know if McLaren will file an official complaint and ask for a penalty or if drivers/team principals will just have a quiet word with each other about the issue. But something will happen.