I availed myself of the late crest version which other than the tender crest is as Kristopher1805's model in appearance. Definitely looks right, and everything I have measured is accurate; and the livery is good for a cleaned loco in service sometime after a works repaint. Coal in the tender and a light dusting of track dirt and exhaust in the right places and that's a good looking model.
...maybe the nicest out of the box performance I ever had...
A decent sized flywheel in the driveline with what looks like Hornby's standard 'black can' motor X4026 delivers this. Immediately good on resistance controller DC, and in went a Lenz standard decoder and the drive is all it should be. Traction is adequate for a dozen coaches; because I need mine to reliably restart a full train all standing on a gradient, mine has an extra 150g of lead inside. (Ample space inside to arrange this so that the model still balances on the centre coupled wheel.)
Really pleasant surprise, Hornby have made a better job of the cast rear frames under the cab compared to their earlier arrangements on the A1/A3/A4 and Brit. No extensive carving required to fit the flanged wheelsets, just clearance for the tops of the flanges, and it would then run easily down to 30" minimum radius which is fine for my layout. (That's where the good news ends, it made the loco really noisy when running - rattle, rattle, rattle - but half a glass is better than none. Future project: chop out the axle mountings and make a 6' wb bogie to take the rear carrying wheels, which will then run silently.)
Had to fiddle with the front bogie to obtain upward travel, filed down the boss on the bogie top so it can now rise relative to the coupled wheels about 0.5mm. Took the ballast out of the tender, eased pick up 'brakes' away from tender wheelbacks, and made a replacement drawbar to bring the loco and tender to correct overall wheelbase. As ever 'closing up' loco and tender to scale really makes the most of an already good model; fall plate lies on the tender step and the cab doors fill the side gap.
Lastly, one oddity. Normally Hornby are good on NEM coupler pocket position, but the tender pocket is further inboard than standard relative to the buffers. As is needs a Kadee #20 for reliable magnetic uncoupling, fixing the buffers retracted on both tender and coupled on vehicle as appropriate would probably enable #18 or 19 to be used, owner experimentation to determine what's required on their layout.