I used to put message on answering machine saying when I was away till.....
Most customers didn't listen to the message, and I would find on occasion a dozen, increasingly annoyed, messages from the same customer!
Leave mobile with a relative, yes, much better, but what about your home phone?
Answer is BT call divert; so you can send those calls to your relative too!
Dont forget, when you get back from holiday, clean their sofa and carpets f.o.c.
Most importantly, you have worked for your holiday, now ENJOY IT
(by the way, don't ring me after thursday for 10 days, I am off to the Caribbean!)