O2's official tethering policy
According to the O2's Terms of Service (ToS) available at Terms & Conditions - O2
O2's official policy about tethering is
Currently if you wish to tether on O2 you will need to purchase a data bolt on, follow the link below for more details.
O2 | Get mobile tariffs and contracts on Pay Monthly
According to the O2's Terms of Service (ToS) available at Terms & Conditions - O2
O2's official policy about tethering is
Regardless of the amount of data you use, you must not use your sim:
in, or connected to, any device other than the one which it was supplied with or intended by us for use with (for example a mobile phone sim only tariff sim is intended for use in a mobile phone not a modem. This includes putting your sim into a modem, modem usage or internet tethering on your device unless stated)
Currently if you wish to tether on O2 you will need to purchase a data bolt on, follow the link below for more details.
O2 | Get mobile tariffs and contracts on Pay Monthly