Replacing bathroom downlights

[QuestionQuigley]

I'm hoping to replace a set of ceiling downlights in my bathroom and hope someone can provide me with some guidance as I don't have much expertise in matters electrical.

The ones I currently have are these bog-standard halogen ones from Wickes:

http://www.wickes.co.uk/halogen-fixed-downlight-white/invt/702944/?tapopen=cm

I'm looking at some Flameguard ones as replacements:

http://www.switchmeon.co.uk/index.php?main_page=product_info&cPath=76_79&products_id=478

Would these be a suitable replacement? I believe they, like the Wickes ones, do not require a transformer - is that correct?

Also, would it be straightforward to do the electrical work required? As I said, I'm no expert though I have done some simple DIY with lighting.

Thanks for any help.

 

[flameport]

They are both 230v, so no transformer required, and one could be replaced with the other as they are virtually the same size.

They are also grossly overpriced, and in reality, no better than the cheap Wickes ones.

 

[QuestionQuigley]

Fair point about the price. I’ve now identified a cheaper version at Screwfix, though I may need to expand the ceiling holes for these:

http://www.screwfix.com/p/robus-fix...ire-rated-downlight-brushed-chrome-240v/49797

There are two main reasons for wanting to replace: (1) one of the existing lights has stopped working (it’s not the bulb); (2) the cut-outs were done shoddily by the plasterer, and the edges are visible in places beyond the rim of the lights, so I want slightly larger light surrounds to hide this.

One other question: I also plan to board the section of loft over these lights. The loft insulation has already been moved around to accommodate the existing lights, so I won’t need to touch that. In order to allow heat dissipation, I plan to drill a 30mm hole in the board above each light. Would that be sufficient to avoid a fire hazard?