If you use a British SIM card, here is an easy and fun way to make a donation to HELP:
Just text EHLP19 plus the sum you want to doante and send it to 70070. So, for example, if you want to donate £10, all you have to do is to text EHLP19 £10, and £10 will wing its way to HELP.
(Please note that JustTextGiving only accepts 6 amounts from donors. These are £1, £2, £3, £4, £5, and £10. A donation of £4.50, £7 or £20 for example will not go through.)