Fully agree Liam548 - I asked for this feature yonks ago, but it wasn't thought necessary. I disagree.

For people who stick within their own country's boundaries, then it won't matter to them. They won't have to file flight plans. But, when crossing international FIR boundaries, where filing a flight plan is an absolute necessity, then it certainly does matter.

If I can't get a WiFi signal and have to submit a paper flight plan, then it would be nice to have the FIR designator clearly and easily identified on the SD charts without delving into the SD FlightPlan process or having to look it up from the paper charts or AIP's or whatever.

In practical terms, if the paper chart cartographers can fit it in, a can't see why SD can't do so as well, especially since SD can expand the scale display so as to provide more space for a little labels with EGHH, EDGG , LFFF etc etc.

Just my humble thoughts.