Toughened vs non-toughened have been a dilemma for kitchen owners for a while. The objective truth is that yes toughened glass is stronger and heat resistant, but due to significant price difference sometimes it makes sense to take risk and just replace mirror in case of breakage, which will still be cheaper than buying full toughened from the beginning, especially taking in consideration that non-tgh antique is stock product and you don’t need to wait for 2-3 weeks for production. If you are looking for simple coloured or printed glass, then definitely go for toughened since price difference is insignificant and it’s not only safer and heat resistant, but also 4-5 times stronger to impact which is good against accidental hits. The other important fact is that broken mirror can bring you bad luck for 7 years!:) so only choose professionals for your installation. We are now producing probably over 100 splashbacks per month with fair share of toughned mirrors so happy to help!

I was hoping to get £150 which is just the proportionate material cost for that size piece. I had to pay expensive delivery and laser cutting fees on top but I'd have done that anyway so haven't included that in the price :) where are you located? We are in Manchester.

It needs to be toughened if it's behind a heat source. Here's one supplier. Saligo design are another big one. Maybe add your location and people may know of local suppliers? https://rougholdglass.co.uk/pages/toughened-antique-mirror-splashbacks

The toughened mirror is fine behind a hob, I don't think it needs to be toughened if it is over 20cm away from the heat source but assume that's not relevant here. I will be using rough old glass (when I eventually get my extractor changed to avoid cut outs). They do offer a measure and installation service but it didnt work out particularly cheap for me as it's just going behind my aga. It may be worth the spend for you though as the glass can't be drilled etc once tempered and I assume you have a few cut outs given the length needed. My wall is also wonky so measuring/templating is somewhat tricky. You may also find local companies offer antiqued mirrors so can opt for measure and install (and peace of mind as they'll have to correct any errors) but it may be a case of ringing round them all as they certainly don't advertise it where I live. I found a number whom offered antiqued mirror but only one whom could offer toughened. i obviously love antiqued mirror but it does also mean tidy worktops :)