Hi Bartosz,
Thank you so much for getting back to me.
Apologies in delay in getting back to you, I’m not receiving notification emails in my inbox for some reason.
I added your code as instructed above, substituting the gallery id’s for the following:

<div style=”display: none;”>
[gallery ids=”301,300,299,298,297,296″>
</div>
You can see the test example on this page here:http://cartmelluxurycottages.co.uk/things-to-do/
Unfortunately as you can see, when you click the image it does not launch my image ID’s.
Could you possibly take a look at where I’m going wrong.
Many thanks again for your time
Darron