I also can't check my chiark account on the iPhone, so if you've emailed me there, it's highly likely that I haven't seen your email, because I don't get many chances to look at it and when I do it's absolutely overflowing with rubbish so I may well have missed important things. If you want to email me, gmail is probably more reliable: I have the same username on gmail as for my chiark account. NB I still don't check email as much as I used to and don't get anywhere near as much opportunity to reply to things! Twitter probably works best if you need a quick reply.
Will try to keep in touch a bit better as things start to get easier.