I'll be staying in Roy Jenkins this year as well. I found a description of hall online but it appears it bit outdated (uni website shows different information about some things). Hope this is helpful.
"Roy Jenkins is a small, self catered hall, split into two parts. One building has flats for couples, whilst the other has 6 flats of 5 single rooms, mostly filled by first years.
There are two flats to a floor. Each flat has a kitchen with a oven/grill/hob, microwave, fridge and freezer. Kettles, toasters and irons are not provided, but there is a hoover and an ironing board. There are 10 good-sized cupboards, which makes it 2 each, plus a drawer each and also some large shelves on half of one wall. The fridge has 5 shelves, lots of door space and 2 drawers. The freezer is a chest freezer. There is a table with 5 chairs. There is also a noticeboard with important information. There is a room with a sink, a room with a sink and a toilet, and a room with a sink, toilet and shower. There are no sinks in the bedrooms. The showers and cookers are electric. The shared facilities are cleaned regularly.
Bin bags and recycling bags are provided. These are to be taken into the bins in the car park. Everything can be recycled together except for glass, for which there is a separate bin.
The bedrooms are a good size (larger than Senghennydd, slightly smaller than Cartwright, for example) and have lots of storage space. There is a large desk, which runs almost the length of one wall. This contains 3 long drawers and a double cupboard. Above, there is shelf space. There is a double wardrobe with some shelves inside and a double cupboard on top. There is a cupboard by the bed. There are 6 plug sockets in the room: 3 by the desk (along with the ethernet cable socket) and 3 by the wardrobe. However, there are no sockets near the bed, which means if you want a bedside light or to charge your phone next to you as you sleep, then you will need to bring an extension lead. There is also a large noticeboard above the desk, space underneath the bed and a bin.
4 of the 5 bedrooms in each flat are at the back of the building, and overlook the car park. The other room - the lowest numbered in each flat - faces Crwys Road, which can be quite busy. The road cannot really be heard from the back, but it can be from the front.
Mail is delivered every day (except Sunday). It is posted through a letterbox and lands in the hallway, to be collected by the recipients, rather than delivered to each flat. Parcels are delivered also. If they don't fit through the letterbox and no one is around to let the postman in, then they are taken to the sorting office.
There are no laundry facilities at Roy Jenkins. These are located at Cartwright Court, which is about a 10 minute walk away. The laundry room contains 3 washing machines and 4 dryers. One washing cycle costs £2, one drying cycle costs £1. It takes 40 minutes to wash and 50 to dry. You could walk back to Roy Jenkins, then return, then walk back, then return, then walk back... You could take a book or some work and something to sit on. You could go during the day and visit Albany or City Road or fight a coffee shop. Or make friends with someone in Cartwright and go to visit them. There are bike sheds in the car park of Roy Jenkins. There are a number of parking spaces, and permits can be obtained.
Roy Jenkins is situated on Crwys Road. It is directly opposited a Co-op (with a busy cashline) and down the road from a Spar. There is a Domino's and a Pizza Hut Delivery 30 seconds away. There are numerous other takeaways along the road. There is a post office down the road as well. There are also some shops and newsagents about a minute up the road, and the halls are about a 5 or so minute walk from Albany Road and City Road, which contain many shops and banks, including a Tesco and Natwest. There is a bus stop near to Roy Jenkins, which has regular buses to the city centre (though it's quite possible to walk there in under half an hour). However, there are no direct buses to the university. It's a 10 minute walk on average to the Humanities building, slightly shorter to Optometry, and slightly longer to Law, Psychology, Music and the main building. It's about a 10 or 15 minute walk to the Union. Cathays train station is next to the Union, with local links. There are 2 train stations in the centre with national links.
Roy Jenkins is a lovely hall in a very convenient location. It is very small with only 30 people (excluding the separate couples section), which makes it quite quiet and cosy. There are far fewer fire alarms than in other residences (a real plus). The rooms and the kitchen are a very good size, much larger than some other halls. They are also cleaned regularly."