Inland Revenue server down?

Anyone else experiencing trouble when trying to file their tax return. I get this messge: 

"If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address."

Is that Revenue speak for "server overload."

I seem to remember this happening last year. At least, they have extended the deadline to 1st Feb now. 

 "HMRC's Self Assessment Online filing service has experienced technical difficulties today, which has meant that some tax payers have experienced difficulties filing online. The system is now rapidly returning to normal levels of service. A record number of 3.6 million taxpayers have already successfully filed online.

HMRC takes any disruption of service very seriously and to reflect this no-one who files electronically or by paper by midnight Friday 1 February 2008 will face a penalty.

We very much regret any inconvenience this may have caused."