With them back to Friday, I assume BB if they had any Friday lauch plans it will have to be a Thursday now

There isI rumours going about that BB is been put back a week because of BGT final is not until the 8th, I expect it to start either 11th or 13th June now.

there is a schedule posted in full for that week now and no BB rumours are pushed a week to not clash with BGT

No BB in the finalised schedule for the 1st to the 7th of June, 13th the plan all along according to an auditionee on TIBB who got far enough to learn it.

It could have launched w/c 3rd June and avoided Britain's Got Talent; the Saturday night show could have aired at 10pm (presming Britain's Got Talent runs 7.30-10 as before) which may have benefited from those who were watching Britain's Got Talent switching over.

Maybe Channel 5 feared it would be overlooked in the tabloids?

Exactly. They have to wait for BGT to get out the way if they want column inches.