The new One Pound Coin designs

Commencing 2004, the Royal Mint is changing the One Pound coin designs to depict various bridges around the United Kingdom. The new designs are as follows:

These new designs represent a departure for the Royal Mint, all previous £1 designs (apart from occasional special editions) have depicted national emblems and Royal insignia, rather than tangible objects, in this case famous bridges. Perhaps something more subtle is going on, the Euro notes also depict bridges in various architectural styles. Are these new coins preparing us for a Euro changeover?