The cache is not at the posted coordinates. The posted coordinates will bring you to a seat outside the newly built Northpoint Tower.
Inside is the new Lavington Library and since we love books and we love our new library we thought this would be a good spot to place a cache. The staff are aware of the cache and it is placed with permission from the library, but it was not placed by anyone at the library so they can't help (plus that would totally defeat the purpose!).
This cache can only be completed during library opening hours: Monday Tuesday, Wednesday, Friday 9.30-5.30, Thursday 9.30-7.00, Saturday 9.30-1.00 and Sunday is closed.
With a little searching around the library it will become apparent where the cache is then it is up to you to work out how to look for it and not be seen by muggles.