Hi Ian, the split box 40 with disc head-code doors is actually 40127. At some point in its life it had nose connecting doors fitted off a disc head-code 40. The combination of class 40 front ends is enormous, you have the Scottish ones that were converted to centre headcode, some with rounded corners, some with square corners, 40158 that head the centre head-code platd over with lenses as per refurbished class 37s and 40058 that had a completely smooth plated over nose at one end only! This is to name a few!
Cheers
Andy
Cheers
Andy