National Express is a long distance coach service and is ideal if coming from further afield as they are fast and do not stop at many places along a route. The NX403 service is a direct link between Central London (London Victoria Coach Station) via Heathrow Airport (Terminals 1,2 & 3) and a few other stops to Wells. This coach service terminates in Street.
There are no changes of coach on this route and the journey time from London Victoria Coach Station to Wells as shown on their website takes approx 3 hours and 40 minutes. Having done this journey the reality is sometimes more than 4 hours as there is often heavy traffic in London.
If you are catching this bus from London Heathrow expect a journey time of approx. 3 – 3 ½ hours. If you are arriving at Heathrow terminals 4 or 5 you will need to get to the coach station located at terminals 1,2 & 3 via the underground tube line.

Web Site: www.nationalexpress.com