Irish director of rugby Brian Smith:
"We've hit a bump in the road and today we just weren't good enough.
"We edged them in the scrums but they kicked the leather off the ball and dominated the field position. Credit to Newcastle - they did a real number on us.
"I didn't think we had enough urgency when we were behind. We kept kicking the ball back to them when we needed to be a bit more expansive."
London Irish: Horak; Armitage, Penney, Catt, Tagicakibau; Flutey, Hodgson; Hatley, Coetzee, Rautembach; Casey, Kennedy; Roche, Dawson, Leguizamon.
Replacements: Ojo for Horak (73), Laidlaw for Flutey (32), Collins for Hatley (71), Paice for Coetzee (61), Murphy for Casey (71), Gustard for Dawson (46).
Not Used: Willis.
Newcastle: Burke; May, Shaw, Mayerhofler, Elliot; Walder, Grindal; Ward, Long, Morris; Perry, Parling; Finegan, Harris, Buist.
Replacements: Charlton for Grindal (56), McCarthy for Finegan (50).
Not Used: Paoletti, Thompson, Gross, Woods, J. Wilkinson.