Brilliant way to save money
Firstly massive credit to bertiebat for pointing this site out
WeQ4U is a FREE Android/iPhone App and Service that puts you through to UK 08 numbers for FREE, without queueing. Mobile users save approx. 30p per minute on their 0800, calls with WeQ4U, whether they encounter a queue or not, so it saves you money and time.
FREE app, FREE 08 calls!
Not got Android or iPhone? Just dial 0333 5432111, and then the number you wish to reach. WeQ4U calls are included in your regular phone minutes, just like 01 or 02 calls, whether you use landline or mobile phone
link to site
also credit to 1hale for the footnote
Remember if using it on giffgaff then go into app and untick the 'use for all 08 numbers' option.
The reason for this is that whenever you dial an 08 number the app would automatically kick in and charge you 0300 prices (1 minute goodybag/10p credit).
However on giffgaff 0800, 0808, 0500 numbers are FREE to call. With that option ticked then it WILL activate for 0800, 0808 calls meaning that they no longer free.