Have just returned from Guernsey, thought I would let others know about the new bus route. Neither the 7 or 7a are running anymore, the 7 route has been replaced by 91, which you catch from the bus terminal. It is the "The Guernsey Vaeux" bus designed for tourists which runs on the hour. The route takes around 1.5 hours depending on traffic.
If you buy your ticket from the bus station they will only sell you a "One Day Ticket" for £4.50, which allows you to hop on hop off along the route and also travel on other buses for the day. However, if you are visiting on a cruise and don't have much time, just buy the £2 single ticket onboard the bus, because hopping back on along the route may not be so easy... It's a long journey and we really didn't fancy standing all the way back to town!
When more than 1 ship is in port, a large number if tourists will be queueing for this 91 bus. Do not let the long queue put you off. Although the bus runs every hour, they will add extra buses until all passengers have got on!
For the best views, sit on the left side of the bus (when facing the front).