Cheap and practical clothes to start running

Go to sports direct for some running trousers (karrimore ones have a convenient key pocket), running shoes (mine were £50) and get a decent sports bra (mine is M&S). Do the c25k for a couple of weeks then get yourself to a parkrun each Saturday - I'm one of the slowest, some people just walk, but it's inspiring (kids, elderly, dogs - all welcome)

I started 5 months ago, still very slow but at least I run 95% of the course!

I have some Primark running trousers and top, they're fab. But do get some decent trainers as you don't want to mess up your knees and feet. Brooks is a good running brand.

Is running a good idea with those knee issues, plus the extra weight (I think our weight hits the ground with squared force)? It sounds like OP shouldn't start vigorous load bearing exercise. I want to suggest rowing, spin, cycling or swimming instead.

Splurge on the shoes in a proper running shop where they offer gait analysis. Then you can get a pair of cheap and cheerful running socks and leggings from Sports Direct. Don’t forget a sports bra, M&S do some reasonably priced ones.
Any t-shirt or hoodie will do on top for now.
C25K is brilliant, have fun!

I started running at 48 and quickly found that I could run in cheap cotton leggings and t-shirts but a decent pair of expertly fitter running shoes made all the difference.

You need to protect your joints and tendons.

The most important thing for you will be getting the right trainers, because of your knees. Find a running shop near you, and they will analyse your gait and advise you about the best shoes, and whether or not you need insoles.

As far as clothes are concerned, Sport Direct or TK Maxx are all good sources of good value/cheap leggings and t-shirts.

C25K is brilliant, but you do need to be able to go for a run 3 times a week (every other day, with a rest on the seventh day). However, even by the time you get to the end (9 weeks) and will be running for 30 minutes, this will take you no longer than 40 minutes - 5 minutes warm up, 30 minutes running and 5 minutes cooling down.

Lidls look like they are going to have some leggings in at the weekend their fitness stuff is cheap but normally lasts a year. I tend to size up abit. Alt I’ve had some M&S ones with a good high waist & pocket, and equally some cheap ones from sports direct be fine.
Trainers it really depends on your running style, some people say the wet foot test helps, (look on you tube) I’m not so sure. You may need to go get tested to see if neutral, cushioned or overpronator (ie does your foot roll in or out when moving). Given your knee issues maybe start with fast walking to see how they adjust? £50 prob good budget for every level trainers if shopping online like sportsshoes. com or upto £100 if in a shop. Good luck the couch to 5 k app is brill for getting into running.