I would really like to believe James, but I just can't. I do agree that you can read certain things into numberplates which it actually doesn't say if you really want to. However, with the 3 x digit plus 3 x letter number code of the dicussed number plates, there are not too many combinations which woult point towards the Falkland war, which is the dominating happening incorporating the UK and Argentina in how many decades? So let's be German and overanalyze it!
Let's try to squeeze "Falklands" or "Falklands War" into a 3 letter code. How many combinations can you find? One would assume that this combination would either need to be a representative part of the original word or a combination of the phonetically dominating letters in the correct order. For "Falklands", I can come up with:
Part of the original word:
FAL - ok
ALK - maybe
LKL - no
KLA - no
LAN - no
AND - no
As for phonetic combinations, the "F" definitely needs to be at the beginning to make the connection, the "A" sound in the middle and the "K" are the end are pretty much interchangeable in importance, the "L" is silent and the "S" adds a plural, so both are irrelevant. The 4 letters of "LAND" phonetically are pretty much equally important. So let's see what we get:
FAL - ok (also see above)
FAA - maybe
FAN - no
FAD - maybe
FKL - ok
FKA - no
FKN - maybe
FKD - maybe
So what if we change it to "Falklands War"? Well, adding the second word obviously robs us of possible combinations for the first word, so we win some and we lose some. The phonetically dominationg letter of "War" is "W", using the "A" or "R" seem too random to make sense. Let's see...
FAW - maybe
FLW - ok
FKW - maybe
FNW - no
FDW - no
Incorporating the "maybe"s, we end up with 9 different combinations of letters which may point to the Falklands or the Falklands War.
So what about the number? Obviously you can do many things with numbers like adding, mulitplying and so on, so you are open to a whole world of speculation. Anything can mean anything when you process it the right way. However, the most dominating number of a specific happening usually is the date, which itself is influenced by the timeframe in which the happening took place. The Falklands War lasted for a little over 2 months in 1982, so unless you point towards the start or end date, you have to go for the year. Using random days or months within the time of this war don't really make sense without linking them to the year. But how many 3-digit combinations are there that could be linked to the timeframe of the Falklands War?
198 - maybe, if you read it as "the 1980s"
982 - ok (probably the best number to point towards the year "1982" with a 3 digit code)
282 - maybe (as in 2nd (of April) '82, start date of the war, a bit far fetched)
482 - maybe (as in April '82, start date of the war)
682 - maybe (as in June '82, end date of the war)
215 - maybe (duration of the war: 2 months, 1 week, 5 days)
Beyond that it really becomes random, and one would have to face the claim of deliberately constructing something that isn't acually there. So let's conclude that, incorporating all "maybe"s, in terms of numbers we're looking at 6 combinations.
Now, let's take a step back and conclude what we're looking at here:
A television presenter is known to provoke people with a passion. To provoke the people of foreign nations, he likes to point out happenings where the United Kingdom dominated said nation in any way, e.g. in a war. For a challenge in his television show, this presenter found himself in a used car, a rare-to-find old Porsche. The challenge incorporates driving this car through Argentina. The last major clash between Argentina and the UK was the Falklands War in 1982. The number plate of said Porsche reads "H982 FKL", one of the few possible combinations (and even one of the even fewer which make the most sense) of letters and numbers which point towards the word "Falklands" and the year "1982". Despite the three presenters liking to banter each other with the manufacturers, models, nicknames or other information (such as the number plate) of their respective cars, none of them noticed this.
How much does that sound like a mere coincidence?