I sent you emails describing this.
Your slider is not working for portfolio items because you have it set that way http://www.clipular.com/c?2105301=bmRoNwonx87Yw5wfl3WlDPKr89M
But I can see the slideshow just fine on the website, not as a preview. http://www.clipular.com/c?2108294=cUjAWkTwNpHSHNJVSbGROTLlO7M but it just doesn't slide, since that's how you configurated it.
Also, there is a setting http://www.clipular.com/c?2106299=1V3MUX9jrLp0z5xj8iVFAu1-IdY which allows you to show the 1st image of a gallery in portfolio archive page, and then not show it in the slide show on the portfolio item page. Take a look here. http://ianrees.bpweb.net/esc-test-area.co.uk/projects/le-manoir/ and you will see that the 'cover image' is no longer seen but instead is shown only here http://ianrees.bpweb.net/esc-test-area.co.uk/projects/ ... This way it is no longer stretched out.
You are uploading images for portfolio items (here i am talking about the photos not the logo), that are of various sizes.
the above image is 930x626
the above image is 930x520
you want both of these images to display naturally in the slideshow and be of identical size. That is not possible to do unless (a) you resize all photos to have identical aspect ratio (b) you allow wordpress to crop your photos.
Right now your settings for portfolio item images (full size) is 930x930 with no crop. When you upload a 1000x560 image, what will happen is that 1000 will start to scale down to 930 and 560 will scale down proportionally along with it. so your end image will be 930x520. ***Always remember to upload images bigger then the size of the space and 560 is less than the size of the space***
I changed your 930x930 no crop, to 930x620 with a crop. however, its a bad solution, and what you need to do, if you want to look professionally, is to use graphics software (photoshop) to resize your images prior to uploading to make them all have identical width and height that is *proportional* to the setting (full size).