Bwin £20 free bet
Bwin, as it exists today, is the result of several corporate deals. First, in 2011 Bwin merged with PartyGaming to form Bwin Party. GVC Holdings then bought the business in 2016. Throughout, however, Bwin has continued to be the main sports book platform with customers of smaller operations migrated onto it. It has been known for several high-profile sponsorship deals, e.g. it was the main shirt sponsor of Real Madrid for a number of years (perhaps why UK punters will be familiar with the name, despite it being a predominantly European brand historically), but the value of these appears to have been in question and new management have cut back.
Bwin's bonus is structured as a deposit bonus rather than a free bet and you will need to wager 5x the deposit and bonus (£200 at maximum) before it can be withdrawn. This is a pretty stringent requirement on a low bonus, so you really going to want to lose, and lose quickly, at Bwin.
If matched betting at Bwin
Use high odds to avoid the bet through requirement.