My Grandmother told me about the reactions of people in Lvov: they took to British and French consulate or representations and demonstrated: "go ahead, help us!". My knowledge of possible plans is nil. But the question is interesting: have there been any at all?
There were Anglo/French plans to bomb the Soviet oil facilities in the Caucusus to stop them supplying Germany. The plans fell into German hands on the French surrender much to Germany's amusement and Britain's embarrassment. The plans are fairly well detailed in 'Target: Hitler's Oil' by Ronald C Cooke and Roy Conners Nesbitt. We can only be thankful that the Anglo/French forces collapsed before the plans could be carried through as the damage would have been minimal but would have pushed the SU further into the German camp (for the time) - Soviet forces could have moved through the Middle East, India etc in retalliation.
Not much: both coutries ventured to guarantee Poland´s integrity. Nothing like reocupation of Ruhr or direct opening of the second front? I´ve always had the feeling that Poland just served as a pretext to start a war to remove nazis from power. Planning could wait.
From what I know, on the western front no allied offensive was planned before 1942. The idea was that the french army should hold it's lines till in 1942 a sufficiently big british army(32 divisions) was ready, and the allies could think of offensive actions towards the Ruhr.(Ironically it was indeed in 1942 when the allies started their first offensives,unfortunately not on the Rhine, but in North Africa). Before 1942 it was acknowledged that german superiority would make impossible an allied offensive. There were indeed plans to bomb the Caucasus oil fields, but apparently the oil fields were not the main objective. The main objective was to make the USSR crumble by using a french expeditionary corps, together with the turkish army. It was planned that the caucasian peoples would rebell against the soviets, as would other minorities. It's interesting that for both Britain and France, USSR was practically a foe. Both countries also tought to declare war to the USSR over the Finland episode. And then there were also efforts to get a balcanic alliance(Yugoslavia, Greece, Turkey and Romania)to war against Germany. It was planned to land an allied expeditionary corps at Saloniki(like in WW1). I cannot really believe that the british/french used the polish episode as a pretext to remove the nazis, as France and Britain entered war at that moment against a much bether prepared ennemy( and the allies knew this).For the allies 1942 would have been a much bether time, as then, french and british rearmament would have been practically achieved. War in 1939 to help Poland meant taking a very big risk for Britain and above all for France.
