I sincerely hope you enjoyed the Maidenhead History Ad Lab. Here are the details on how to find the Bonus Cache.
You need the numbers you are given after completing each stage of the Ad Lab. Make sure you note these.
Please note the original host is now accessible again. Please make sure you replace it carefully and out of sight.
Depending on the time of day, there might be many muggles around.
N51 31.ACD W000 43.BCE