About 4 hours, or perhaps 5 if you have to drive from S.E. London.
About six hours
The Lake District is quite large and times may vary. From London to Lake Windermere is about 4 hours and 30 minutes without stopping, using the M1 and M6.
6 hours drive from Nottingham
16 hours
The shortest time is 2 hours and 36 minutes.
The drive time from Salt Lake City, Utah to Washington, District of Columbia is:1 day, 8 hours
Yes, Oxenholme Lake District station is on the outskirts of Kendal and is served by long distance trains between London and Glasgow. There is a small branch line from Oxenholme to Kendal and Windermere.
You don't say whereabouts in the Lake District - BUT - as an example... Shrewsbury to Kendal is a distance of 127 miles, and would take roughly 2 hours, 40 minutes to drive - according to Google Earth.
3200km long
The Lake District is about 54 km across (west-east) and 48 km long (north-south).
Google Maps estimates the driving time as 29 hours.
Chelsea is in London.