You see what the clever lawyers at Nationwide do is to charge you for training - and then lend you the money to pay for it. So effectively you dont have a bond but a loan. However in the same contract it says after four years you don't owe the loan anymore - so that sounds like a bond. I think they do their best to confuse and intimidate you into just accepting their way..
Fact is they charge too much for the training so I guess you could take them on on the account of grossly profitting from employing/training you??
Would love to know how - if at all - you get out of that.