Whilst officially regional Eurostar services have not been cancelled but are "on hold" or "under review", there are no longer many people who expect them to operate on current lines, although this may be reconsidered if the proposed High Speed 2 line comes to fruition. The most often cited reason given why they have not run is that they are economically unviable in the current climate. The 1990s saw a huge expansion in air travel across Europe with low-cost airlines - a business that had not existed in Europe when the Channel Tunnel was planned - flying from most major cities in the UK to locations on the continent, against which regional Eurostar services, with predicted journey times of almost nine hours for Glasgow to Paris, could not compete.