" A near monopoly broadband/landlind provider in the UK, will own a major mobile provider."
If OFCOM were competent they'd require the new BT to demerge Openreach. Shareholders would still own both operations, so no loss to them, and they could elect to keep or sell either BT's service business or the Openreach monopoly according to their investment objectives.
Unfortunately we all know OFCOM couldn't find their own arse with both hands. FFS, they don't even require BT to have separate statutory accounts for Openreach, which is virtually unheard of in regulating asset based businesses.
So expect this deal to be rubber stamped.