Polyfilla fallen behind socket is this a problem?

[sodaha]

Hello - I had some new sockets fitted and the electrician did not do a very tidy job around them. I have put polyfilla around the edge but in my tidying of that once it had dried, I pushed a bit too enthusiastically and pushed some of the filler behind the wall plate - see where gap is now above the wall plate. I can redo the polyfilla more carefully but I first wanted to check whether there is a danger given there is now small fragments of polyfilla behind the wall plate

[Mr White]

I wouldn't worry, just be annoyed I had done it.