Wasp woes

[The Poot]

I fitted tunnels to all four hives - two had electrical conduit tunnels along the front, giving two entrances, one right one left.
On the other two I fitted the same conduit tunnels, but fitted so the bees exited under the brood nest [see photo].
One had a single piece of conduit, as in the photos, the other had two taped side by side.
The effect was wasps were seen entering the lateral conduits but backing out when confronted by a line of bees. Not many wasps entered the conduits leading under the brood nest. Wasps predated bees at the lateral conduit entrances more easily than the under brood ones as the number of bees outside the hive (coming and going and defending) was divided left and right. Whereas the bees were concentrated at the under brood entrances and defended more effectively.
I hope that makes sense?
I read that wasps tend to skirt around the inside walls of the hive once they get inside to avoid bees, but when exiting a tunnel under the brood, the bees are much more likely to kill them.

 

[Karol]

I asked elsewhere
The answer I got is Vespulas Germanica Vulgaris and Rufa.
<snip>

Germanica and Vulgaris account for the lion's share in the UK. Unlikely to encounter Rufa as quite scarce and a specialist woodland species. More likely to have problems with Sylvestris, Norwegica, Saxonica and Median species (depending on topography and location)