Irish Rugby Trivia Question

[tackle-bag]

Here's an interesting one:-

When was the last time that all four provinces won, each with a four-try bonus point, in the same weekend?

I'm not sure whether it has happened previously. If it has, I would doubt that it occurred in Europe.

[CRAZYDAVE]

I do recall a grand slam of victories a number of years ago, but cant recall whether each province got a BP.

[tackle-bag]

I recall several occasions on which all four provinces won, but can't remember an occasion on which they all got bonus points (or furthermore managed not to concede any bonus points). It's not the most amazing of occurrences but it should at least provide a bit of motivation going into the 6N.