Hello! I’m a U.S. citizen traveling to the UK. After arriving at Heathrow, I’ll take the tube to Euston station (I believe Elizabeth Line to Tottenham Court Road then Northern Line two stops to Euston) to take a train to Liverpool. Before I book a train to Liverpool, I’m trying to figure out how long it will take me to get to Euston from Heathrow. How much time should I safely budget? I land around 8am at Heathrow. Thank you!