About ⅓ or a third of the way, you can stop at Brentwood, United Kingdom. This is almost an hour east of London.
About ¾ or three fourths of the way, you can stop at Colchester, United Kingdom. This is about 1½ hours northeast of London, or about half an hour southwest of Ipswich.
If you drive straight through without stopping at all, the total distance is 135 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 2 hours, 6 minutes.