Cutting Red Robin

Sorry, I know there has been a thread about Red Robin before, but I can't find it .  My Red Robin is producing nice new red shoots at present, but the bush is very spindly.  Should I sacrifice the new shoots and cut it back to thicken it up?  (I'm in the north of Scotland and the weather is very dodgy at present, lol)   Will I get more new shoots this year if I do cut it now?

Thanks in advance.