Motorway Mayhem M40 Bonus Cache Mystery Cache

To locate this cache you need to first find and log four Motorway Mayhem M40 Letterbox Hybrid caches at junctions 5, 6, 7 and 8a. Each of these contains information required to locate this cache. These are:

Once you’ve obtained the necessary information from each, make the corrections to the above co-ordinates. The checker will give you further information.