i think any company can change your terms and conditions of your contract if they give u the proper notice and there is nothing u can do about it.
If you are not getting paid travel time and u start a 8 am then you leave your house bang on 8am so when u get to your first job it will be or close to tea time?.And its the same at night time you are home at your finish time.
And if you are traveling down to a course and are not getting paid travel time then u should ask to travel down the day before in company time and request a hotel to stay in.If u have to leave your house at 5am or 6am to travel down to a course its not really safe beacuse you might not have had the correct amount of sleep and not be fully alert at the that time in the morning and im sure it advise this in the highway code book
But the reality of things in the forklift industry the pay for engineers is crap bottom line and really should be thinking of getting out of this industry if u want a better salary