Wakey get told all the time to share a stadium with Cas. It's exactly the same.

Why would you be sure of that?

A single club playing out of a stadium doesn't make sense financially. Whether it's another rugby league club, a union club or a football club, shared stadiums are the only way to make them financially viable.

Forward thinking club, Gloucestershire all golds, are in talks about building and sharing a stadium with football club Gloucester City.

I think that you should re phrase that.
Sharing may make more financial sense but, it's not absolutely essential.
Of course, in the modern world, its all about "maximising revenue streams" and the more use that clubs can get out of their facilities, the better it should be financially, that is, unless you share with a premier league football club and then you can only play when they let you

Hull FC don't seem to have too many problems.

Their ground isn't built on a swamp

Well, if EGW is correct in his assertion upthread that it's an FA rule, then that's not a true statement, is it?

2.3.1 A Club’s Ground may be shared with another Club or any other club (including a club
engaged in another sport) providing, where sharing with a football club the Club or club
playing in the most senior competition has priority of fi xtures at all times and, where
sharing with a club engaged in another sport, the Club has priority of fi xtures.

TAKEN FROM THE f.A's standard rules.....

Can't see how they could enforce it if the football club don't own the ground. In the Wigan case. Wigan RL playing, wouldn't have stopped Wigan AFC playing, just made it inconvenient.

it all comes down to the actual contract for use of the ground with the owners...because F.A. rules state the football club has to have priority use over any other sport to be allowed to play there if they don't own the ground 2.3.1 above and 2.3.2. below:-

2.3.2 A Club must either (a) own the freehold of the Ground or (b) as at 31 March in each year,
have a lease of the Ground which does not expire until at least the end of the next Playing
Season or (c) possess a written agreement for the use of the Ground which is acceptable to
The FA and the Competition

Doubt whether the RFL have any such conditions with clubs within their rules....

End of the day Lenigan was told he couldn't use the pitch on Friday and the contract he inherited probably doesn't allow him to force the issue

Pretty sure you're on the money. I think if he'd come out and said as much he'd have attracted far less flak.