easiest thing to do in my opinion is to get yourself an o845 number. This can be attached to your home phone. It has two advantages, well three lol. one, you dont disclose your personal number to clients, two it looks more professional than a mobile and three it reduces the cost of having so many phones (i used to own 3 mobiles for 3 business' and it cost me a grand a month!). Another advantage is if you change mobile providers/move house/get a shop you can keep the same number. It costs you nothing to get an 0845 number, costs the client the price of any local call and is cheaper than them calling a mobile. I then divert my home phone through to my mobile when I am out. My 0845 has a filter system too, so the client is put on hold if for example I am already on the phone. It also has an answer machine that the client can leave a message on that is then text to you, also if the client (like many of us) hates leaving a message, the system captures their phone number so you can call them back. I set it up with my opening hours so the 0845 number will only put calls through to my own phone between 9.30am and 6.30pm after that it automatically goes through to an answer machine that explains the business is closed but they will be contacted in opening hours if they leave a message. You can set your own days/hours that you want to recieve or not recieve calls. You can have as many 0845 numbers you want on the one land line we all have.
To stop confusion as their are 2 business' currently set up on my landline so I just answer the phone by saying my name.
Hope this helps
Kate