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Watching (as opposed to listening) was going to be a bit of an issue - I refuse to take out a 12 month contract for BT Sport, just for 5 or 6 weeks of cricket.
But ... I seem to have the BT Sport App for free on my EE iPhone, and have found a neat way of streaming that to my TV - not quite perfect HD, but near enough.
Also, if you have BT or Plusnet TV, I've found that BT Sport 1 is available for free and is showing the Ashes live - and highlights are on at 9am tomorrow.
I don't have landline broadband ... but I've discovered that a certain small Irish person (no names, no packdrill) has Plusnet TV ... I may have to visit occasionally :)