otyt, yes, you had mentioned the depression before, hence the worry 
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BHA is a really personal decision. So long as you're not ingesting it and using concentrations under 2% it's deemed 'safe' for use during pregnancy but not everyone is comfortable enough with that. Alternatives are an AHA, but they tend to make you more photosensitive which isn't a good thing. Azeleic would be an option but you'd probably need to get it prescribed, though you can get it through Boots' acne clinic without too much hassle IIRC, but probably best to discuss with a GP or similar. Possibly Mandelic Acid would be a good fit for you at this time as it has less of the pigmentation issues and it's preferred by POC over glycolic and lactic for that reason.
You can stick with chemical formulations for SS but try to avoid avobenzone (INCI name: Butyl Methoxydibenzoylmethane) and oxybenzone. Also watch out for Retinyl Palmitate as it shows up in SPF incis now and then. Again, they are possible hormone disruptors rather than proven so theoretically considered 'safe'.
Tsk, tsk, yong, don't you know you're supposed to move from influenzaville to affluenzaville where all the sickeningly rich bastards reside? You're not supposed to take the scenic route past tonsilitis! Hope you're doing better today 
Yes, Sophie, I use the Toleriane Ultra Night and like it a lot more than I thought I would. I've been taking a look at the Medik8 Retinol, going by the INCI I suspect it's in the same base as the CE Tetra which is very light and absorbs really easily. However, things to keep in mind, it is a retinol in a dropper bottle which makes it harder to keep stable which would explain why it's a weeny 15ml bottle and that makes it kind of expensive. I suspect you'll use a bit less but per/ml it's not that much cheaper than the Medik8 R-r, not that I'm suggesting you get that instead but just something to be aware of as it's a smaller amount than normal, which perhaps is also nice as it's a bit of a trial?
Joz, I'm not a fan of the essential oils in the Sukin but if you're not overly sensitive since you're washing it all off not super problematic.
Pupsie, just playing devil's advocate, how sensible is the jade roller purchase? I tend to classify massagers as innocuous but it's a different story if you have rosacea, you have to both minimise massages in terms of frequency, pressure, and time (no longer than a minute really) but the temperature change induced by the jade would be another possible irritant for rosacea.
JDSTER, I think the more interesting question always is, what apps have you paid for? I have a few functional ones -wallet by budgetbakers which I like a lot, a few banking/creditcard/paypal, a couple of shops, Aftership, a shipping tracker that's handy as it keeps track of various different couriers, Feedly acts as my RSS reader, I have a lot of international papers and magazine feeds in there. Kindle, I mostly seem to be reading the samples lately though 
Pupsie recommended Seconds for the Tabata timer and I'm really pleased with that. Can't decide whether to upgrade it though as the only benefit I can really see is that it would save me from setting it up every morning, which takes, well, seconds. Do you have the full version Pupsie?
I like a lot of the Google apps, Google Keep gets the most use, checklists, random links, things I want to see/do, meal planning, grocery lists, etc. It's very simple but being able to tag things is quite helpful. I tried Evernote and Pocket before but never got on with them like I have with Google Keep.
Snapseed makes for a really nice photo editor, Visco as well, I'm not much of a selfie queen though so not sure how well it works for that. Makeupplus is quite fun to play with.
I have Babbel in a few languages to keep it fresh, mostly in a run-up to a holiday.
Offtime is brilliant to ensure some quality non-phone time.
AdGuard blocks ads in any browser, which works brilliantly, the premium version also blocks ads in apps which saves you shelling out for ad free versions.
The app that's sitting there and mocking me is YourCloset, my dreams of photographing everything I own and having it organised like I'm Cher in Clueless remains a hollow dream...
Kindle books I mentioned recently were, The Telomere Effect (that's pretty cheap at the moment), The Science of Skincare by Hannah Sivak, and Brain Food: The Surprising Science of Eating for Cognitive Power.
mint, that mineral SPF isn't new, it's been around for a bit. Perhaps new to the UK market? It's got a nice fluid consistency but it has a bit of a white cast, so depends on how fair you are really.
Pupsie, I'll look at that video later, I don't think it explains everything, I think it's more like a factor, as one among many others, diet, general wellbeing/health, sun exposure, the hardness of water, humidity levels, etc. in combination with your genetics. However, these threads have very much opened my eyes as to how damaging some products can be without people realising it, I've always been sensitive (it goes beyond skin, same as some people have an atopic disposition) so never went too mad with anything. Then again, sometimes you end up on a thread on MN where people have brilliant skin despite absolutely abusing it (if it was my skin) that makes my poor face freak out just at the mere thought of it. I also have to keep in mind that us skincare obsessives are only a very small representation of the general population that uses skincare regularly and a very specific one at that.