There are many more takeaways up here in the Rhondda compared to where I used to live in Cardiff and it's a real act of will power to restrict myself to only having one on my way home from City games. There are some good ones closer to my house, but, for afternoon kick offs at least, I've settled on this one;-
https://www.thecrispycod.co.uk/
My one whinge about it is that it wasn't the cheapest before they put their prices up recently, but now I'd say it's in the expensive class. However, if the higher prices are going towards things like those described in the link below, then I'm happy to pay them because their fish and chip (and curries and pies!) are excellent. Don't take my word for it though, having been voted the best Fish and Chip shop in Wales, it's now one of ten nominations for the award of best in the UK.
https://www.bbc.co.uk/news/uk-wales-46116353