They're the same as these people:
https://uk.trustpilot.com/review/dronesforless.co.uk
I reckon they import the stuff from the States, so may not come with UK/European warranties. I've not purchased from them though and not sure I would!
At least they have a London address but looks to be just an upstairs office at 77 Beak Street.
There's more reviews here:
https://www.google.com/shopping/seller?q=dronesforless.co.uk&hl=en_GB
though most of the 4/5 star ones contain no detail. Suppose they've reviewed themselves!

I don't use these but this one's free or £15 for the full version:
http://icecreamapps.com/Slideshow-Maker/
Reviewed here:
http://www.pcadvisor.co.uk/download/audio-video-photo/icecream-slideshow-maker-2...
Seems you can try before you buy!
See it in use on YouTube here.

Maybe I've missed something... but which Tamron!?

That's odd isn't it. They're cheaper in the states despite the fact the dollar is worth less than the pound. Seems Ricoh are having a laugh and have their conversion rates the wrong way round. ($1795 at B&H is equivalent to £1450, less than the UK initial price.)

From smudge's home area it would take less than an hour to drive the lens to Sigma's HQ. A no brainer!

Set up a scene to simulate a model and practice to see what works for you, and repeat the shots until it works (almost) every time. If the shots are constantly front or back focussed It could be the camera needs the fine focus adjusting for the particular lens (most lenses seem to require this.)

Great! Who provided the chips?

I can't find any mention of Lens babys on here since 2014.
There's a review here: http://uk.pcmag.com/lensbaby-composer-pro-ii/72401/review/lensbaby-composer-pro-...
I still say it isn't a shift lens but a tilt lens; that review makes no mention of a shift function at all. If its a shift lens you're after, that isn't it!
Just as an aside, the camera sensor can be shifted to some extent to simulate the effect of a shift lens. A tilt effect can be easily simulated in software.

Its fine on mine, not even the body scratching is a real issue. smudge, why not send it off to Sigma to get the mount replaced and ask them to update the firmware while they're at it? You could run it up the A1 to them quite easily from East London to Welwyn Garden City. A stone's throw!

The K-1 sensor pixel density is more in line with a K-5 than a K-3. The K-3's have a 24.3 mp sensor (6016x4000 pixels), whereas the K-1 is 36mp (7360x4912 pixels) for full frame, but only 4800x3200 pixels for APS-C, so in actual fact for telephoto shots the APS-C K-3's would win out for cropping purposes.
However, the K-1's lower pixel density means the exposures will have a lower noise level for a given ISO and if you can fill the full frame you're going to have a superior image to that on APS-C. Your choice!
Both those lenses would be fine with a K-1in full frame mode.