This is not good.
Based on the article: It works out at about 70 complaints a year (771 since 2010). The article mentions that 446 cases were dropped because the initial allegations were not substantiated by investigation - which I suppose comes back to the old issue of 'he said/she said' but does say there were 163 arrests of serving officers, 46 left the force before investigation concluded (so wouldn't be in the 163, regardless of outcome hand 71 complaints withdrawn (no further detail)
Of the 163, 78 were charged, and if those that have already been to court, 38 were found guilty, 23 not guilty, two recorded as 'no conviction' and two had no result recorded.
They also give figures for cases treated as conduct matters, rather than criminal offences.
43,000 staff in the Met Police (the numbers include both police offices and civilian staff - but the largest group by far against whom allegations were made are police constables.
It's not good enough.
It's a small percentage, but police are meant to be behind reproach