Refuelling during IFR flight, possible?

Hi,
A few weeks ago I've started a flight from somewhere in Spain to somewhere in USA (I don't remember the airports, it has been a while). I was not avare that the fuel won't be enough for this flight.
I used the flight planner to set up the flight (IFR). It just drew the route first towards Britain then to USA. (I guess flight planner does not warn if the fuel is not enough for a flight?)
I make little sessions and then save the flight. Now I am somewhere over France.
I wonder if I'll be able to re-fuel somewhere in Britain without cancelling IFR and continue my flight to USA under IFR conditions.
Is this possible? Will the ATC offer me to refuel or will I be able to offer refuelling or will the controller just watch me sinking and crashing to ground with no fuel :o ?
By the way the aircraft is default Learjet. I even don't know if this will make from Britain to USA if refuelled at Britain.
A few weeks ago I've started a flight from somewhere in Spain to somewhere in USA (I don't remember the airports, it has been a while). I was not avare that the fuel won't be enough for this flight.
I used the flight planner to set up the flight (IFR). It just drew the route first towards Britain then to USA. (I guess flight planner does not warn if the fuel is not enough for a flight?)
I make little sessions and then save the flight. Now I am somewhere over France.
I wonder if I'll be able to re-fuel somewhere in Britain without cancelling IFR and continue my flight to USA under IFR conditions.
Is this possible? Will the ATC offer me to refuel or will I be able to offer refuelling or will the controller just watch me sinking and crashing to ground with no fuel :o ?
By the way the aircraft is default Learjet. I even don't know if this will make from Britain to USA if refuelled at Britain.