Your washer can become a blocked washer quite easily due to a build up of washing powder amongst other foreign objects, if this problem arises the best way to deal with it is by:
No.1. Check under the kitchen sink to make sure the kitchen sink trap is clear where the blocked washer Drains, if all is free under the kitchen sink proceed to
No.2. Trace the waste pipe from the kitchen sink to the outside Drain and make sure the Drain outside isn’t blocked, if all is free on the Drain which the kitchen sink and washer waste goes into then proceed to step
No.3. You have now determined the blockage is between the blocked washer and the kitchen sink trap, try to unblock washer, if all fails do not hesitate to call SOS Bradford Drainage.