Yes there is and it's
the UK AIS website. It will do exactly what you ask and over multiple FIR's. You need the Narrow Route Briefing. Also please read the FAQ's on the site so that you understand how the height filtering works. You will get ground level up to your FL plus 4000 ft for the first and last legs of your route. Intermediate legs will be +/- 4000 ft of your nominated FL so if you don't want low level info make sure that you put a waypoint in near to your departure and destination airfields.
Given the furore in this and other forums in recent months I'm surprised that you do not already know about this site.
Also check out
http://www.telecall.uk.com/ais for further info.
You might also like to look at the following
http://www.notampro.com/
http://www.notamplot.flyer.co.uk/ you'll also need
http://mysite.freeserve.com/ais2plot/index.html
http://www.altais.org.uk/
http://www.avbrief.co.uk/
Mike