The average heights in the UK have been previously described as 5'9" (men) and 5'4" (women).
Bush may be 5'11'' [source:
http://www.otherarena.com/htm/cgi-bin/biography.cg
i?georgewb
] but they may be taking the micky. Blair seems to be 1-2 inches taller than Bush. Of course you can never tell how's wearing high heels. I'll refrain from saying anything that may incriminate me politically about these two - but I'm wondering why this question should have occured to you today of all days?!