At first glance all signs point towards it being a reprint. He's wearing a tie, for one thing (one of the first things Appleby changed), and the lettering looks very much like Nixon's handwriting.
But some things muddy the issue. The colouring, for example, looks nothing like Nixon's work (I believe he hand-coloured his strips, whereas this looks computerised), but this would be easily explainable by the strip having originally run in black and white prior to 1993. So this sets an upper limit on the original printing date.
There's also no signature visible, but I have no idea when Nixon started signing his work - I presume when he took over in 1984 artists were still strictly anonymous.
The title looks like Appleby's work to me - nothing like the letters in the strip at all. It also goes outside the border and into the panel, looking, in short, as if it had been Photoshopped in along with the colour. Why, I can't imagine - surely the original would have had a perfectly good title?
The most intriguing aspect is the shape of the pages. This was most definitely drawn for A4 paper - the border has the same aspect ratio as the comic. I don't know when the comic switched to the wider size, but the earliest (non-reprinted) Beano I have is from 1990, and that was definitely wider. Comparing the two corresponding Roger strips side-by-side suggests there was definitely no way the wide one could have been convincingly cropped or otherwise narrowed. I suppose it's possible they just squashed it like they casually stretched all the artwork in the 2011 annuals, but why would they do that if they were planning to shrink it and add a chequered border anyway? The recent Appleby reprints could be discerned by the very fact that they hadn't been squashed, and hence the border was narrower at the sides than at the top and bottom.
It should also be noted that it's on one and a half pages. This dates it after 1986, prior to when the strip was a single page. It's possible the 'Dodge Diary' was originally a Dodge Clinic strip, which would help to date it further, but my aforementioned 1990 Beano, while also having a spare half page, just filled the space with an advert. How common was this practice? I'm pretty sure even some relatively recent strips were drawn to this length.
So, in summary - after 1986 (more than one page), before 1993 (monochrome), probably before 1990 (wrong paper size). Can someone tell me when the Beano was first printed on wide paper? Or, alternatively, when artists' signatures were allowed, whichever came first? The window of opportunity for a sustained run of reprints in the coming weeks is already quite narrow as it is. I do hope Roger's not going to pull a 'Billy Whizz'... or, worse, an 'Ivy the Terrible'...



