Is 451 correct for burger and fries??

​I ordered the single smash burger and fries. But everywhere I look the calories are listed VERY differently!

​On the menu in the restaurant it said burger INCL. side = 625 cal.

​But the online order system (pics) seems to say the burger incl. side is 451 cal.

​And when I look at them separately on the nutritional info (last pic) it's 666 cal for the burger + 525 cal for the fries = 1,191 cal.

VERY different calorie counts! ​Which is correct??

This is Honest Burgers in the UK if relevant.