Former World’s Strongest Man Eddie Hall took part in a training session with the Great Britain squad.
The publicity marked the announcement of the Lions’ new partnership with fashion retailer boohooMAN.
Hall was pictured wearing the classic Great Britain shirt alongside Lions players Oliver Gildart and Chris Hill.
The boohooMAN logo will feature on the sleeves and shorts of the Great Britain kit, and fans can claim a 30% discount on orders by entering the code ‘GBLION30’ at boohooman.com.
Rugby Football League chief commercial officer, Mark Foster, said: “It’s an exciting time for international rugby league and we’re delighted to have boohooMAN with us as we venture on the first GB Rugby League Lions tour in 13 years.
“The boohooMAN brand, which has built an extensive range of social media influencers, is the perfect partner to help us reach a younger audience and grow our great game.”