We are aware of some recent latency issues with the Cross-Realm Battlegrounds on the following realms and these will be unavailable from 01:00 CEST in an attempt to resolve this. We estimate the downtime to be around 1 hour:

Alonsus
Anachronos
Bronze Dragonflight
Burning Steppes
Darkmoon Faire
Darkspear
Kor'gall
Lightbringer

Our apologies for any inconvenience caused.