Was Sir William Gull 'Jack the Ripper'?

I was veering towards agreeing with Marriott about Feigenbaum, but stuff on the Ripper casebook website has told me a lot the programme didn't, and makes the case against him seem a lot weaker.

Supposedly serial killers don't totally stop - unless they're stopped, as it were - by death, getting caught etc. Though some of them occasionally seem to be able to leave off murdering for years.

I tend to think that Jack was a Londoner, probably living in the east end. He seemed to know it well and probasbly had a convenient bolt hole nearby - which is what helped him get away and "vanish". I doubt he was anyone famous/of public importance/from the upper classes - anything like the mythical "toff" in a topper with a black bag, the classic image. There are some eyewitness descriptions of a man seen with the victims - "shabby genteel", a peaked hat, possibly around 5 foot 7 inches, in his late 20's /30's. One candidate is George Hutchison, the itinerant man who supposedly talked to Mary Kelly and watched her on the night she was killed. He only came forward as a "witness" late in the day, and it seems possible only did so because he had been seen near Kelly's place on the night of the murder. Not saying it was him, but it was probably someone like him. The current favourite candidate for Jack seems to be Aaron Kosminski, a contemporary police suspect apparently, a poor Jew who lived in the area; he was later judged mentally disturbed enough to be confined to Colney Hatch lunatic asylum, where he died many years later.