The accuracy checker attempts to match the name given against the race names found at coursemeasurement.org.uk. To do so it not only tests the name submitted but also tries various truncations of the name, truncating from both the left and the right. The longer variants of the submitted name are tested first. When truncating it tries to avoid leaving a name that only contains common words such as "the", "miles" etc. Matching is done in a case insensitive way.
This is the percentage similarity between the race name you gave & the one matched. The percentage similarity is known as the Sørensen–Dice coefficient and is calculated using Simon White's algorithm at http://www.catalysoft.com/articles/StrikeAMatch.html .
If the accuracy checker cannot find a match at the date given then it will try the date of the corresponding week and day of prevous years. It will try up to ten years before the date given. It will also check a week either side of the corresponding week and day. For race dates on Boxing Day and New Year's Day it will also try the corresponding day of earlier years. If the date given is on Easter weekend, from Good Friday to Easter Monday inclusive, it will also try the corresponding day in earlier Easters.
If the accuracy checker finds a match on a date earlier than the one given, it is possible that an edition of the race occurred on a date other than those checked. This shows matches for variants of the race name given where the race date is later than the one matched. It is possible that one of those dates gives more recent course accuracy information than the date matched.
This is the county or area name as it appears at coursemeasurement.org.uk. If you choose London as the county then the search will try both London and Middlesex.
This is the distance for the race course as it appears at coursemeasurement.org.uk. Note that distances at coursemeasurement.org.uk can be inconsistent in the way they are displayed. For instance, marathons are sometimes listed as "26m 385yds", sometimes as "42.195km" and sometimes as "42195m".
Most races listed at coursemeasurement.org.uk are road races. However, there are some events on surfaces that are not fully on road but are measured with a lower guarantee of accuracy. Multiterrain events have a "statement of accuracy" and races on unsealed surfaces (i.e. not tarmac, concrete, paving slabs etc.) have a "registered distance" certificate.
Certificates of accuracy can be renewed without remeasuring for up to 10 years if the course has not changed.
This contains the HTML code needed to provide a link to the coursemeasurement.org.uk page for the race. The Copy button will copy the HTML code to the clipboard and it can then be pasted in as required.
If the accuracy checker cannot find a match at the date given then it will try the date of the corresponding week and day for the previous ten years prior to the given date. It will also check a week either side of the corresponding week and day. For race dates on Boxing Day and New Year's Day it will also try the corresponding day of previous years. If the date given is on Easter weekend, from Good Friday to Easter Monday inclusive, it will also try the corresponding day in previous Easters if that has not already been tried.
The accuracy checker attempts to match the name given against the race names found at coursemeasurement.org.uk. To do so it not only tests the name submitted but also tries various truncations of the name, truncating from both the left and the right. The longer variants of the submitted name are tested first. When truncating it tries to avoid leaving a name that only contains common words such as "the", "miles" etc. matching is done in a case insensitive way.
For each name variant tried in the search, this shows other event dates that are listed as accurate at coursemeasurement.org.uk for the same county. You can click on each date listed and that will get the accuracy information for that name on that date.
This shows other events that are listed as accurate at coursemeasurement.org.uk for the same county (or area) and dates that have been tried in the search. You can click on each event listed and that will get the accuracy information for that race on that date.
Note that the name matched is less than 50% similar to the race name submitted. The similarity percentage is calculated in a case sensitive way.
Note that the date matched is for an earlier year and not the date given.
Note that it is 10 or more years since the race course was measured so it will probably need to be remeasured to get a new certificate.
Note that the race is not classified as a road race at coursemeasurement.org.uk and so has a lower standard of accuracy. Multiterrain events have a "statement of accuracy" and races on unsealed surfaces (i.e. not tarmac, concrete, paving slabs etc.) have a "registered distance" certificate.