Just done it this morning at the UK embassy. Here is the system.
You have to fax your passport copy. Every Tuesday between 8-10, you go in it take 5 mins to collect a UK police clearance form. You pay Qrs.360. They have a fax number to send your passport copy to... thrown it out sorry,...but just call in to get it. Put on the top of the copy "For Police Clearance Purposes".

Once collected, they will give you a bit of paper telling you to get it attested at the Ministry of Foreign Affairs. The next step is to CID with a couple of photos.... Basically, you need to wait till next Tuesday to finish step one.