Personal view on Tolmie's info updates (don't know the guy personally and have never met him) however I have noticed he's right most times than not. Regarding his sources and the information he receives, I have no doubt that it's being supplied by someone within the club and that what he's been told, he's been told.
The only question mark is as to the accuracy and integrity that the person within the club sharing this info is being with TH. Sometimes they might be exaggerating a touch, maybe chinese whispers, misrepresenting the reality of what's going on or only hearing second hand info. So whilst I don't doubt that what Tolmie shares he has been told (i.e. he's not making anything up himself or embellishing it and that sources within the club have genuinely shared it with him), the question mark is on the sharer and whether the information is as accurate as what they've told TH, however, not knowing the circles he runs it at City, I cannot reflect or opinionate on the sources he has or their character.