OK, TEK pool on CentralCavern has been moved to it's own dedicated server - the problem was caused by other coin pools draining resources.
As TEK is our most highly regarded coin, we are content to give it a space of it's own  

http://tek.centralcavern.uk is now stable and miners are hashing away happily.

apologies for any inconvenience the last hour may have caused, and best luck to all!