When we started weaning our girls, I found the actual NHS guidance pretty sparse on the practical day-to-day stuff - and a few friends going through it both around the same time and more recently, said the same. The main alternatives we found were either not really UK-focused (a lot of the well-known apps/sites are American) or just took a lot of effort to actually use day to day.
So far, from digging around in a bunch of these same conversations elsewhere, I've seen people recommend the following a lot - hopefully summarising it here with some of the actual reasons people gave saves someone else a bit of digging:
How to Wean Your Baby (Charlotte Stirling-Reed) and The Weaning GP - these two books keep coming up more than anything else. The Stirling-Reed one gets recommended for its 30-day structure, and more than one person said they'd recommended it to literally all their friends, which is about as strong an endorsement as it gets. The Weaning GP is newer, has a big Instagram following, and people like that it's half practical how-to and half recipes the whole family can actually eat together, not separate "baby food." Worth knowing though - a couple of people who bought it also ended up saying they wished they'd ditched a similarly-structured book earlier and just cooked whatever the family was already eating, adapted down. This was in fact the approach we ended up taking eventually (3 girls!) - essentially whatever we ate but with no salt, mushed up with a bit of water. Took a while to figure out though.
Solid Starts - the single most-mentioned resource by far, mostly for the age-by-age serving size and food safety lookup (how to cut a grape, when a food becomes a choking risk, that kind of thing). The catch that comes up constantly: it's American, and the pricing has clearly annoyed people - one person mentioned it used to be under a fiver a year and now the subscription price feels "ludicrous" to them. A few who paid for the guided content specifically also said they found it disorganised compared to the free lookup tool, which people still rate highly.
Nara Baby - the app that gets recommended most often as a free alternative for actually tracking what's been tried, when, and any reactions. People like that both parents/carers can have their own login on the same child's log, and that it's held up across more than one kid rather than being a one-and-done novelty. A close second mentioned in the same vein is Nanny Louena, which people rate for letting you filter by diet type and for giving you a printable allergen chart, which a couple of parents said they still have stuck to the fridge.
Free, official routes - a genuinely large chunk of people didn't pay for anything and instead pieced it together from the NHS Start4Life pages, the free "Eating Well in the First Year" PDF from First Steps Nutrition (several said their health visitor pointed them to this one specifically), and Ella's Kitchen's free weaning chart and digital guide, which stacks with a free recipe book if you're signed up to the Boots Parenting Club. A number of people also mentioned their local health visitor team running a free in-person "intro to solids" session, and more than one said it was more useful than anything they'd read online.
The low-tech stuff that keeps coming up alongside all of this - steaming a single vegetable and remixing it across several different meals with whatever's in the cupboard (a spice, a carb, a cheese), rather than following a recipe book meal-by-meal, was mentioned as a way to make the whole thing feel less like a second job. Freezing portions in ice cube trays got mentioned constantly as the actual thing that saved people's evenings, regardless of which app or book they were nominally following. And practically everyone, regardless of which resource camp they were in, agreed on one non-negotiable: the right bib (Bibado's smock-style ones came up again and again) matters more than almost anything else on this list.
If people are happy to add to this and it's allowed (I haven't used Reddit much until I decided to look into all of this) I can update the post to include any suggestions people consider worth adding.