A handful of Vera fans who tuned into Tuesday’s classic episode of the Ann Cleeves-created crime drama were left less than impressed to hear a warning about the instalment before it began. Vera has become a ratings smash for ITV over the years, usually dominating the 8pm time slot on Sunday evenings when new episodes air. The series is on a hiatus at the moment until the 14th and final season airs next year, but ITV has still provided fans with their fix of Brenda Blethyn and co through repeats. On Tuesday night, the sixth episode of series 11 aired on the channel as fans got another chance to…