Queen icon Sir Brian May, 77, has announced the “painful decision” to resign as RSPCA vice president after 12 years in the role. The rocker cited the RSPCA’s Assured scheme as the main reason for his resignation, explaining that “appallingly bad standards of animal welfare” were supposedly on display in member farms. May hit out at the RSPCA’s response to complaints about animal welfare at said farms, claiming the organisation’s reaction has been “completely inadequate”. The 77-year-old, who’s also recovering from a stroke ordeal, penned in an open letter to the RSPCA: “It is with profound sad…