Noise invasion is a dreadful thing & one that should be taken very seriously. I suggest you look up your local Council's website & see what they say under Health & Enviroment. They will probably suggest you keep a log of the dates, time, duration of the noise (unfortunately over a period of months) & you could also ring on Monday just to check you're doing what they require to prosecute. You're not a grumpy old bag at all - just one stressed out lady wanting to enjoy her home after work. Been there, done that & there's nothing worse than having your sanity driven to breaking point. My neighbours, now moved thank God, had a son who blared music out for hours as soon as they left the house. The Dad's solution was to give me the garage keys & permission to throw the fuses. As much as you may want to retaliation with noise doesn't really work & gets out of hand - SO tempting to do I know but not a good idea.