If you’re interested in having access to tidal predictions between UK tide gauge locations the National Oceanography Centre have released a tidal predictions app anyTide. This provides tidal elevation and current information at 1.8 km intervals around the UK coastline, http://noc.ac.uk/business/marine-data-products/anytide

For those of you who use the UK Hydrographic Office EasyTide predictions, these are based on software developed by the National Oceanography Centre. So the data at tide gauge locations should be the same.