That is on the second page at the top i assume?
Mine has this too, so they are mentioning this id situation twice, once in a formal clause refferring to 21 (5) and then again on page 2 before offering the options to move forward

Indeed, following by: on the basis you have failed to evidence the identity of your sponsor in the form national identity card or passport. and then regulation 21 (5) quoted so they are offering to appeal or submit new application. My current visa is valid for another year and a half so i am guessin...

Yes,they did. Within 14 calendar days

The same here, mine is refused too because didn't provide ex Id (sent in April this year). All other documents were absolutely fine and in full. Just our of interest, did anyone appeal and won without id (or by providing a copy in an appeal package) or better to send a new application and include or...