I am not sure if this sim only will have inclusive 08 numbers.
Legal stuff for the sim only from the above link.
Pay Monthly SIM Only: Credit check & payment by Direct Debit required. Included in your tariff (subject to the allowance specified): UK calls to UK landlines (beginning 01, 02, 03) & UK mobile networks. Person to person texts within the UK. Data is within the UK only. Acceptable use policy applies. You cannot use your phone as a modem or use internet on your phone for peer to peer file sharing.
Calls to 08 (incl. 0870) & 070 numbers not included in monthly allowance and cost up to 41p and £2.50 per min. respectively in the UK (see our website Tariff Table for details). Pay Monthly service terms apply.
SIM Only: Credit check & payment by Direct Debit required. Exclusive extras only available to Virgin Media cable or national customers. Minutes and texts are for UK calls to UK landlines (01, 02, 03 numbers), mobile networks & other Virgin mobiles. Web access is within the UK.
Calls to 08 (incl. 0870) & 070 numbers not included in monthly allowance and cost up to 41p and £2.50 per min. respectively in the UK (see our website Tariff Table for details). Pay by Direct Debit & Bundles service terms apply for 30 day rolling SIM only.