I agree with Unscheduled stopover. Get the pain over and done with, even with the additional topics involved.
I did the CPL first, and the ATPL some 3 years later. I wish in both time and effort, not to mention two exam fees, I had gone for the ATPL straight off. Having said that, when I took them going straight for the ATPL was not possible for very low hour people.
At least that particular rule was changed for the better.
You never know what is around the corner, and not having a fATPL might inhibit you from that unknown [as yet] dream job.
Forget the BCPL route.
Are you employed on an airfield, or by a local authority ??