Issue 5, the Smurfs comic (March 1997)
Issue 6, the Smurfs comic (April 1997)
The brand has changed (from DeVere entertainment limited to DeVere House of fun) but this is definitely issue 6 in volume as on page 2 it refers back to issue 4 (of volume 1 and it can't be referring back to issue 4 of volume 2).
James Hill on facebook also commented
...not sure whether or not there actually was a #6 for volume 2. We'd stopped packaging by then because DeVere had stiffed us for payment. They'd already gone bust once - see changing logos which signified a change in company - and we'd taken a hit on the last few issues of volume 1. When no payments arrived for the first couple of issues of volume 2 we decided to call it quits.
Issue 5, the Smurfs comic