Here are some current cheap SIM only deals and options available:

• You can find SIM only deals starting as low as £1.48 per month for 5GB of 5G data with no contract. After the initial 3 months, prices may rise (e.g., to around £4.95/month). These deals offer flexibility and help save money by not including a handset contract.

• Major UK networks like Vodafone, Three, EE, and O2 offer competitive SIM only contracts that include data, minutes, and texts. Vodafone deals can start from about £6/month, and Three offers great value with roaming and tethering features.

• Many providers offer both short-term (e.g., 1 month rolling) and longer contracts (12 months or 24 months) to balance lower upfront costs with flexibility. Typically, longer contracts reduce monthly costs but require longer commitment.

• Smaller networks (MVNOs) like Giffgaff, Tesco Mobile, Voxi, Smarty, and Lebara use the infrastructure of the big four networks and offer cheaper plans. For example, Lebara offers no-contract plans starting at around £3.18/month with decent data bundles and no credit check.

• SIM only deals are generally more cost-effective if you already have a handset or plan to buy one outright rather than through monthly installments, resulting in yearly savings of over £300 on average compared to handset contract bundles.

Overall, depending on your data needs and contract preferences, there are many cheap SIM only deal options, with flexible contract lengths and various data allowances starting well below £10 a month. You can select based on coverage, price, and extra perks like roaming and tethering. If you want, advice or comparison help for a more specific data allowance or network, feel free to ask!