Truck
This link on the BA site states you allowances clearly
https://www.britishairways.com/trave...club/_gf/en_gb
In summary, BA's standard weight allowance is 23kg per bag and there is usually a maximum weight (for H&S reasons) of 32kgs per bag. Normally BA levy a 'heavy bag' charge over 23kgs.
However, if you fly in a premium cabin, BA will waive this fee, as well as for certain frequent flyer card holders.
The page clearly states that you will receive the higher allowance for both segments.
Because you are travelling in Club Europe, you are allowed to take 2 pieces of hold luggage per passenger.
Enjoy your trip.