LED bathroom down lights - how to change

[jlhg]

Can someone advise me on how to change these lights - i thought i'd just be able to take the bulb out but it appears to be attached to the fitting - they are about 8 years old. Any advice would be greatly appreciated! Pics below

 

[UNG]

Difficult to tell from the pictures whether the lamps are removeable, are there any labels or part numbers on the fiitings

 

[Murdoch]

Not sure I recognise that

Is there another part ?