What would be the best route for this journey during tube strikes? I see that I can go via Elizabeth Line to Farringdon, then Thameslink to St Pancras and walk, but would this be possible with an XYZ to London Underground Zones 1-2 ticket? I am travelling from the GEML to Manchester Piccadilly, and I'd ideally like to avoid the Norwich to Liverpool Lime Street EMR service. The journey cannot be done on a day without strikes. Any help/advice for this journey would be greatly appreciated.