That reminds me I meant to say too there is no difference at all between the DC’s and the DCP’s. DCP’s only existed for a few years, they were reserved for passenger work, hence the P.
And there is no difference externally between the DFT’s and the DFB’s. The only difference is the DFB’s have ‘Brightstar’ wheelslip control systems installed in them, hence the B. And I think all of the DFB’s now have fire suppression gear installed. But apart from that the DFT’s and the DFB’s are identical. Apart from the odd minor difference in livery like the photo’s attached