The most effective way is if he does end up in hospital, they have a department which is all about getting care in place so someone can be discharged home, because until that happens, they are blocking a bed, so there's a lot of effort goes in to doing this quickly. With my dad, the NHS even organised temporary home care for the few months it took the council to find a company to take over.
If you're not in that situation, it's going to be more difficult. You can look yourself of course, but adult social care at the council can do this for you, and engage one of the companies they use. All councils have recently started charging to do this. They will send an occupational therapist to assess his needs, and they can be really useful, suggesting and providing aids to help him at home, as well as suggesting what care he needs. That might include hospital bed (so you can get him in and out), lifting aids, etc. Be careful about offering to do the care yourself - that will end up leaving you as carers, which is a different relationship that being family (unless you want to do this, of course), and it will remove the urgency for the NHS or council to find and engage someone (which means it won't happen).
Engaging a separate house cleaner (perhaps weekly) might be cheaper than paying carers to that. Personal recommendations from friends can be a good way to find a local trustworthy cleaner. This depends if he would be self-funding his care or covered by the council, which depends on his financial situation.