the text is too light - take it a shade darker
missing capital here
"located in Sittingbourne, " (front page)
move your styles into an external stylesheet and use erlative units (i.e. percentages or ems: NOT points, unless it's for a print stylesheet)
have you tried gif or 8bit png for your header image?
your alt text should reflect the text in the images
otherwise it's clean, has a nice personality. good job!