On their site:

PLEASE NOTE THAT ELECTRICFLIGHT UK LTD IS UNDERGOING A VOLUNTARY LIQUIDATION

Apologies for any inconveniences, but due to UK retail Statutory terms and conditions, and certain customers feeling that they need to exercise those rights, we have decided that the time and effort to support the UK modellers, has been spoiled by a very small number of customers. They know who they are.
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I can only assume that some customers have done something that is causing them to go out of business. Perhaps someone cut their finger on a prop and a customer sued them for liability. That's what they would do over here.