Robert
Can someone ring on your behalf, you will need to be present to authorise the DWP to speak to the person but it is the quickest to make a claim.
If you can't arrange this then you can write to the DWP for a paper copy of the PIP1 which is the form completed on the phone, your claim does not start until the pIP1 is received back by the DWP.
Personal Independence Payment New Claims
Post Handling Site B
Wolverhampton
WV99 1AH
Our PIP Claim guide has a list of the questions you/your representative should be asked on the phone call.
www.benefitsandwork.co.uk/help-for-claimants/pip Gordon