Britain's Got Talent judge Amanda Holden said she felt "impelled" by the images of disaster in the Philippines to help the aid appeal.
Speaking at today's telethon she said:
"It's the mums in tents with kids that always upsets me when any disaster strikes.
"At the weekend I said to my husband I need to get in Red Cross van and go there."
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A top temperature of 9 or 10 Celsius (48-50 F).
The poll comes ahead of a debate in the House of Commons on Friday on a new Bill which would introduce such a system in England.
Jobs with decent pay and flexibility are "few and far between" for single parents who are the main earner and carer, said the report.