FragNet have performed some major upgrades in Frankfurt, Germany, which will give them much better control over network routing when tackling issues such as DDoS attacks, however they are still optimising the new equipment and in the mean time this may be causing some players to experience network lag and random disconnects.
The country you are connecting from and even your ISP will affect the amount of lag you experience (if any) until the optimisations are completed. If you do experience severe network lag then please send me an email at; admin@diggyminecraft.co.uk including your country and ISP so that FragNet can investigate, this will help them identify and fix any issues faster.
Hopefully this isn't affecting too many players and will be resolved soon for those it is affecting!