I have bought from both George Jackson (were in Hammersmith, now Sutton, Surrey), and Hayles & Howe, Bristol in the past.
A couple of thoughts:
- Unless it's a Georgian place, and/or you are doing a direct replacement, go slightly simpler than the design that most appeals to you. So for most Victorian or Edwardian places choose something a bit smaller and a bit less decorated than the books tell you was correct. It'll fit right in, and look like it belongs.
- Avoid "3D" Acanthus leaves like the plague (the 'stick on with plaster slip' sort). They're really hard to fit perfectly and keep on the ceiling afterwards, and a total PITA to paint properly. And you'll catch yourself looking nervously upwards for years afterwards...
- Don't trust any existing lath to support the pendant light, if it's anything other than the simplest single bulb. Get access above and fix a 3" wide strip of decently thick ply across between the joists, as close to the top of the lath as possible. Drop the twin+earth slightly offset from the exact centre, as that's where the support bracket usually needs to run. Do a dry run upside down on the floor (I.e. with the electrolier's fittings) to catch any issues, before you fit the rose up there permanently.
- If the electrolier has a chocolate block as the connector, you don't necessarily have to keep all three parts together - splitting it into three individual connectors may mean it all fits under the cover much more easily.
- I have a simple rule with metal light fittings, both freestanding and wall or ceiling: I do not trust any statement or logo that indicates "double insulated". It's roughly translated as "We're too cheap to fit an earth!". So...
... I contrive an earthing point on any metal light fitting that doesn’t have one. I pay special attention to ceiling fittings, on the basis that getting a shock up a stepladder can also involve an attack of gravity. You can get suitable tags etc. from Ebay, Amazon, etc., and it's usually practical, without compromising the "double" insulation itself. I'll not go into the details on this, as it gets very specific.
Suffice it to say, if there are any sharp metal edges anywhere near the wiring, either fit your own earth or take it back and complain, or both. I once succeeded, with the help of Trading Standards, to get a range of light fittings withdrawn by a big retailer, as TS agreed with me that the sharp metal bits inside meant a "double insulated" status was ridiculous.
Enough already!
E.