Whatever you do, don't bother trying to get anything out of the UK CAA, they are a pain in the @rse - as usual. I gave up trying to get a CAA TRI rating on the 604. Sorry to be so negative, try the Portuguese authority, they seem to be user friendly, or if you have connections in the Swiss authority, you could probably get one for asking, just as certain others have done.... wow those grapes taste sour !