From the dashboard of your my.plan account you can easily access a whole suite of Spend Controls¹

To configure a Spend Control on a specific usage type, go to:

CONTROLS > SPEND CONTROLS > DATA/CALLS/TEXTS > [select user] > SET UP

To set an Ofcom Total Spending Cap, which applies a restriction at your chosen spend limit, regardless of usage type, go to:

CONTROLS > SPEND CONTROLS > OFCOM TOTAL SPEND CAP > [select user] > SET UP

Need a bolt-on, to provide reduced cost roaming²?

Go to:

PRODUCTS > DATA > choose:

• Daily Explorer (single day allowances)
• Executive Traveller (single day allowances for Exec.plan tariff subscribers)
• Global Traveller Data / Minutes (calendar monthly allowances)

¹available to Gold & Platinum account users and Essential account users via an upgrade 

²account permissions apply