Regional split for sussex wedding photographers

There is a geographical problem for some businesses wishing to optimise their services on the internet search engines.  Take, for example, the case of sussex wedding photographers.  Most people looking for photographers on the internet would know about Sussex as a region and its proximity to other counties in the south east of England.  What is less known is that east sussex and west sussex are counties in their own right.  And even more uncertain is the boundaries between the two counties.  So keywording and search engine marketing has to be thought through and planned in a very careful way by webmasters.