In my experience, if in doubt, it's always best to ask. If they don't answer, assume the worst.
Also, be prepared to be surprised, as in my experience, you will often be surprised by the responses. When you expect to get a "No, sod off!" you'll probably get a "Sure, no worries." and when you expect to get a "Sure, no problem!" you'll probably get a "no, bugger off!".
Also, be prepared to be surprised, as in my experience, you will often be surprised by the responses. When you expect to get a "No, sod off!" you'll probably get a "Sure, no worries." and when you expect to get a "Sure, no problem!" you'll probably get a "no, bugger off!".