The website needs to make reference to " sandblasting" "wetblasting" "gritblasting" .
While i appreciate your process is none of these things (directly) . This is what generally your uneducated customers will be looking for ie "sandblast gates" "grit blast building" etc.
http://www.macblast.co.uk/five-service-areas/ The overuse of the word "removal"
could be consued as "keyword" spaming by google.
Change the H2 tag Get sandblasting/wetblasting/gritblasting in there. It's one of your keywords.
[img width= height= alt=]http://www.macblast.co.uk/wp-content/uploads/2013/10/banner6.png[/img]
<div class="banner_title">
<h2>Low Pressure & Environmentally Friendly</h2>
</div>
</div><!--close banner-->
Just being constructive