When Vettel emerged from the pits he was about 8 seconds behind Hamilton, the fact that (if I remember correctly) he was nearly 25 seconds off when he managed to pass Bottas seem to corroborate the claim that Bottas slowed down Vettel, and this despite the fact that Bottas somehow managed to be much quicker when his second set of tyres was already worn out than he could manage right after his pit stop, which is amazing because normally it's the other way round.the assumptions that Bottas purposely was blocking or
even more specially hit to Vettel to help Hamilton are nonsense.
The proof is that by the time of the incident, Hamilton's advantage was so great
that there was no point in risking anything for Bottas.
whether Bottas slowed down Vettel on purpose or not is debateable (I think that his priority was to keep Vettel behind him), BUT the fact that Bottas slowed down Vettel is corroborated by the gap that Vettel built up following Bottas.
What no one has been able to explain to me is how on earth Bottas, after his pit stop, with brand new tyres, could only do mid 1:23 and all of a sudden, as soon as Vettel emerged from the pits behind him, he managed to do several laps in the mid 1:21m, either that is a miracle or there's more than meets the eye