Because of difficulties, have ticket to Paris FOR TOMORROW, but need to get to LONDON either TOMORROW OR NEXT DAY, any suggestions?
Check out cheap flights (www.whichbudget.com, etc) Paris to London or cough up lots of bucks for a train ticket.
You can also try coach travel/long distance buses or piece together yourself train/coach to Calais, foot passenger to Dover and coach/train to London.
Air might be your best bet.