Where are these please?

More images that I have no location for. I think they were all taken on 20/11/1983 by someone who travelled on the Cornish Branches railtour, details of which are on the Six Bells Junction website. They should be in an 'as shot' order.
Update 18/05/2014. Images 1,2, 5 and 6 are all from the Coed Bach Connection Railtour of 08/10/1983. Further info under each image.

1. DMU, 08 shunter and lots of railtour passengers!
Update 18/03/2014. Now identified as Cynheidre Colliery

2. Waiting at a junction
Update 18/04/2013, now identified as Llanelli West Junction

3. An overturned clay hood wagon. Confirmed as end of the line at Parkandillack. Thanks for the info.

4. Is this Boscarne Junction? Now confirmed as Boscarne Junction, thanks for the info.

An update to try and clear some confusion

It has been suggested that number 1 above is in Wales and nothing to do with the Cornish Branches tour, which doesn't surprise me. Number 1 above is number 3 in the sequence, numbers 1 and 2 in the sequence now appended below. Image 2 above is number 8 in the sequence, so could very well be Welsh as well. I do have a gap in the sequence from 9 to 16. I'm coming round to the fact that the only Cornish images is numbers 3 and 4 and all the others are from the Glamorgan Freighter railtour of 05/11/1983.
I still don't have clue regarding locations!

5. This is number 1 in the slide sequence
Update 18/03/2014. Now identified as Aberthaw Power Station. The nearest loco is Peckett 5014, the further a Drewry class 04 lookalike, RSH 8199.

6. This is number 2 in the slide sequence
Update 18/03/2014. Now identified as Cynheidre Colliery