Hi Hywel
I've owned and quite heavily used (for a home workshop) an ex schools AEW Viceroy / Denford / Horizon for probably 15 years now. I think Denford took AEW over at some point and so I'm never totally sure which name to use.
It's a Vertical mill version – I personally wouldn't entertain a horizontal only mill because they are simply nowhere near as versatile; you can do just about anything you'd want to do with a vertical head, including drilling of course.
I too have a penchant for British machine tools that probably owes more to nostalgia than logic – but I first bought a brand new gleaming Chinese mill, the type with a round column, which I kept for less than 2 years before selling and buying the Horizon.
I did strip the sliding parts, clean and adjust it when I first got it, but it's never missed a beat since. I have no intention of changing it yet and would happily buy another if it bit the dust.
It's reasonably well made and accurate for it's class, with a small footprint, just the right size for my workshop. It will take a good cut without complaining, but it's not an industrial mill by any means. The slide ways do not have any proper protection, which has always worried me – no bellows or even felt wipers. Still, to be fair, it doesn't seem to be wearing and it has done a lot of hours of work. One slight restriction is that the Y movement will stiffen slightly now if there is a big torque on the bed, for example if I have a heavy dividing head on the far right of the bed and I mill something on the far left. The width of the shears could have been a bit wider to overcome that, but hey, I only notice it when I'm being lazy.
One thing that caught me out though was the stupid trick of calling it a metric mill. Nope, it was an imperial mill with approximated metric dials, I kid you not. I can only think that they could get away with that for education use, because it didn't look as if anyone had replaced anything and all leadscrews were the same. I screwed up a couple of parts before realising that 25mm of dial movement was really moving the beds 25.4. Grrrrr. I quickly slapped a DRO on it.
Cheers Will