About ¼ or a fourth of the way, you can stop at Gravesend, United Kingdom. This is about half an hour east of London.
About ¾ or three fourths of the way, you can stop at Herne Bay, United Kingdom. This is about 1½ hours east of London, or about half an hour west of Broadstairs.
If you drive straight through without stopping at all, the total distance is 128 km. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 1 hour, 58 minutes.