I think the reason why their not releasing these files is not because it has anything to do with the royal family but because of some of these reasons:
When the original scotland yard was blown up (by the IRA), quite a few of the jack the ripper files were destroyed.
Over the last 100 years, an unbeleiveable number of these files have been taken by members of the police force, some as souviners, some sold to the press, some to authors etc, Theres been numerous cases of the folders been there in storage but when they open them the actual files are gone.
They had a main suspect but never had the proof, & if the files are still there they cant name him.
The police force then had its fare share of foul ups & dodgy dealings, & theres no way there gonna shoot themselves in the foot by exposing these things by releasing these files, as these things always have a chain reaction effect,as it might not have too much sensitive evidence about jack the ripper but something else they've discovered by accident while searching for him.
Just my opinions folks:websleuther: