Originally Posted by
Ldnn1
I think this is too strong a view. The OP's question is whether it's humanly possible, to which the answer is: yes, if the VS flight arrives on time or early.
If it's delayed even a bit, or if there is bad luck with queues at one of the crunch points, then it's very easily missable. But it is possible.
What the OP presumably knows is that he's up a creek if it goes wrong. But it may be that he has an easy way of getting a cheap replacement flight to FRA if needed, whether that's miles, staff travel or whatever. If that's the case, I would go for it.
In my view it is not a theoretical "is it physical possible" question, despite the way its worded. It as looking for advice before(hopefully before) purchasing a ticket.
OP, in my view this is a huge risk. If all goes well there is every chance you make your flight in T2, but it would not take a lot to go wrong and you are hosed. I would recommend you look at what the cost of a back up plan would be should you need to purchase new tickets on the day and see if you are prepared to take that risk.
Does lufthansa offer a same day change option like BA does? if so, it may be worth booking a later flight to FRA and then if you do get to LHr on time try to change it to the earlier flight