Numbers starting with 0800 or 0808 are freephone numbers and cost nothing to call in the UK.
Freephone numbers allow callers to ring an organisation at no charge, with the cost of the call paid for by the organisation receiving the call. Common uses for them include:
Numbers starting 0800 and 0808 are free to call from all landlines and mobile phones in the UK
Prior to 1st July 2015, most mobile networks charged for calls to 0800 numbers and 0808 numbers. This is no longer the case, as new regulations introduced by telecoms regulator Ofcom have made all calls to such numbers free from mobiles.