Dan Scarr, back in action after injury, equalised for Blues moments before the half-time break.BCFC
Blues used what was effectively their Under-23s with some senior players and trialists.
Dan Scarr, back in action after injury, equalised for Blues moments before the half-time break.
But two goals in 18 second-half minutes restablished Las Palmas with a comfortable platform, and they added another for good measure.
Las Palmas went ahead in the 12th minute, through Momo, who drilled a shot in at the back post after Tana missed his contact originally in the centre of the Blues area.
The vastly more experienced Spanish side moved the ball around fluidly on the lush St. George's Park pitch as the game settled into a pattern.
But they didn't really unhinge Blues in the first-half, who fielded David Stockdale, Jonathan Grounds, Nicolai Brock-Madsen and Greg Stewart.
Trialist Cameron McGilp was paired in central midfield with Odin Bailey.
Stockdale made an excellent flying save to keep out a shot by Tana, that was arching towards the top corner.
And before they scored, Blues got more and more into things.
Stewart went close with a curving, low free-kick from 30 yards and there were promising openings coming down the left.
Scarr's goal came literally seconds before the half-time whistle went.
Kyle McFarlane was flattened wide on the right after chasing towards a ball down the channel.
Greg Stewart took a wicked inswinging free-kick with his left foot that deceived goalkeeper Nauzet Perez.
Stewart's cross looked to be heading in until Perez desperately batted up his hand and diverted it onto the post and crossbar.
The ball bounced down and loose and despite being on the floor amid a tangle of bodies, Scarr managed to readjust on his backwide to get his boot on the ball and turn it over the goal line.
Blues brought on Ryan Stirk for Tommy Anderson at the interval. Bailey moved to the left flank.
Four minutes into the period Las Palmas worked a nice move to regain the lead.
Tana slipped a short reverse pass in behind the defence from a central position and Erik Exposito turned it back across Stockdale from 12 yards.
Brock-Madsen had to withdraw due to a tight thigh muscle, George Baker coming on. Stewart went up front to partner McFarlane.
Scarr, on his first game of pre-season, was taken off just after the hour, as was Stockdale.
Blues went further behind, in the 67th minute, when Las Palmas constructed a series of slick passes, across the pitch.
Diego Parras crossed hard and low and Edu Espiau stuck the ball emphatically past trialist goalkeeper Tom Glover from close range.
With 17 minutes remaining a loose ball in midfield was latched onto by Rafa Mir and he sprinted forward down the middle before letting rip with a powerful shot from the edge of the area to make it 4-1.
It was difficult for Blues to establish a real rhythm and pattern due to the changes after the break and Las Palmas, who used their first choice players for the majority of the match, controlled proceedings.
Blues: Stockdale (Glover 63), Martin, Grounds, Scarr (Bajrami 63), Redmond, Stewart, McGilp (Lupano 66), Bailey, Anderson (Stirk ht), Brock-Madsen (Baker 54) , McFarlane (Amartey 79).