Originally Posted by AndrewRobson:
“Sorry if this has already been said, but this series must take place before The Runaway Bride.
In that episode the guy in the tank said "Mr Saxon says fire at will", yet here he hasn't been elected yet.”
Hasn't been elected PM , if that's what happens but that doesn't mean he didn't have some sort of influence over the military at that point.
There's also the fact that the bride appeared in the Tardis immediately after his final goodbye to Rose , not several months ( years ? ) later.
I think , unless a specific date is given , contemporary episodes are usually in chronological order