The Suntour Nex on the Boardman has manual lockout on the fork not really necessary to have a button on the bars.
mine also developed a squeak but it functions as well as always so I just took it as one of those things, can one ignore it or does one have to do something?Mine is the 11amp non high torque kit and unfortunately it has also developed a 'squeak' after just 140 miles. Its also intermittant which makes locating the source even harder, especially when it only happens when I am on the bike. The frequency does change with wheel rpm so that may help diagnosis but I am unsure yet whether its a spoke tension or motor issue. The noise can also change to something like a 'graunch' too, and sometimes it stops completely for a bit. Rather frustrating as I found the kit really quiet when first installed. In fact, I felt the motor was far quieter than expected. If I had a clue on how to check/adjust spoke tension I would give it a go but its one area I dont want to go near as theres every chance I could make it worse. I dont know if Halfrauds would take it on either.