1. The fellah that's Paddy Considine's partner in Hot Fuzz. Whatever he's in, he still looks like he's playing the copper in Hot Fuzz.
2. Central London - how difficult is it to CGI the geography of major London locations correctly?
3. If you were the major military power whose pre-eminent service was the NAVY, surely you'd lure them tripods out to sea where they'd not have such an advantage?*
*I've never read the book or got past 'Forever Autumn' so this might happen.