Welcome back
Now for the Culture shock as the number of loco's has declined in favour of units then those of us who still collect numbers have diversified. So now you can find groups who collect
Wagons
Coaching stock
On Track Plant (including Road Railers)
Departmentals
as well as loco's and units
there are quite a few different spotting aids around at various prices most combines now retail at +£15 and when you add in subscriptions can get a little
What I've started (as it's a non-stop job) is make an Excel database of all loco's, coaches, wagons, Departmentals, OTP and the like not forgetting preserved stuff so I can keep track of what I've seen
Good luck it does get mind boggling compared to the old days when numbers had a D prefix