I will suggest we exercise some control over anxiety. Yes it may be difficult but I think it is the way to go. Personally, I dont think e-mails to the Prime Minister are necessary at this point. While I am not a Pastor, even the bible says we should be anxious for nothing (difficult) but give thanks to God in all things. If we know God, 'll rather we talk to him in our closets, give thanks and find some peace and calm. Again the same bible said, the hearts of the kings and priests are in the hands of the Almighty, and he turns them in the direction he wills. If I have a worry or concern, I certainly know without a doubt, who I should be talking to. Most of the answers to our concerns are in the scriptures.
That said, mine is just an opinion, anyone who still feels compelled to do an e-mail to the PM can go ahead, although like one other forumite said, there should be some caution as regards how much personal information is divulged. My 2 cents.