Hoi.
I am very sorry to have learned that Amir Ladsgroup may not enter the United Kingdom for Wikimania. As you may know, Amir is crucial to the development of the Pywikibot software.
Not having him present is awful. Obviously other people can present but it is not the same as Amir presenting.. It may be possible to have him present by Skype or Hangout.
Would this be an option ?
For your information the amount of effort that has gone in acquiring a visa for Amir has been huge. A big thank you to all the people involved. It is sad that all the effort did not produce the result we all wished for.
Thanks,