People on this forum are familiar with your excellent architecture shots, so I'll focus on your website.
-I'd keep personal shots separate from your professional shots. Flickr? Your personal shots don't look especially personal though (ie - no family shots) and many are relevant to your professional ones.... so they work well together
-I like the clean, uncluttered navigation.
-Pronouns in 'about' sections are always a tricky one. Should you use 'I' or 'we'?? You've gone for 3rd person here which gets a little clumsy:
On a personal level, living in the Middle East has allowed Phil to travel widely
It's obviously written by "Phil" so either change it to "him" or just go with the honest "I". If you have a partner, go with "we", but to have "Phil" repeated half a dozen times sounds awkward.
-Your seem to have only 1 client on the clients' page. Although this may be true, I'd pad out your professional experience a bit more by creating a few untraceable fake client portfolios.
Panasonic G3: 9-18mm, 14mm, 20mm, 45mm