I think it's around £40 pa - which is absolutely nothing when you think of the dozens of different sports, multiple cycling events (Dauphine + Tour of Wallonia today) and never ending catch-ups.
As far as I know - just on a PC but I normally sit by my PC (writing my poetry and all) anyway. I'm not very techy so I don't know if you can link a PC to a "smart" TV nowadays. I have Freesat which uses the Sky dish. For the Grand Tours (and things like the Dauphine) ITV4 coverage has been steadily improving over the years and is doing more live afternoon coverage than ever.