You say you have two valid reasons but do you know if these reasons are acceptable to the court?
The courts do not like having litigants in person attend by telephone but if a telephone hearing is acceptable the applicant must arrange this through an authorised supplier e.g. BT Conferencing and pay the fees. The usual fee is £40.00 + VAT for a hearing lasting upto 40 minutes with up to 5 attendees. Over 40 minutes the charge will increase by £0.40 per minute per attendee.
Telephone hearings are recorded and record of that recording is available at additional cost if required.