I have been given a phone number for my interview, using which and a reference number, I can connect to any number of interviewers in a room. The drawback for me with this is that I do not have a proper data plan with my provider for this call and I will be incurring enormous charges.
How do I communicate this appropriately to the interviewer? Should I offer alternatives like them calling me on my mobile number? Will that be appropriate?
EDIT: Wanted to add that the number provided to me was a 0330 number - both of us are based in the UK. I checked with my provider and the per minute costs are 20p, working out to £50 for a 2-hour interview - more than the cost of transport to that city!