But thanks to the absurdity of the IT system, she will probably still get the Bronze and the Silver packs through the post (in my case, Silver before Bronze!)

Worth noting for anyone who is moving up quickly, the tier bonus does not always track correctly so it might be necessary once the dust has settled to get in touch with the BAEC - they will have need manually adjust the Avios but in my experience it was done quickly with no fuss. ^