Hi @cupcake,
Regardless of your plan, you'll be able to use your allowances in Spain. If you're on PAYG, or joined/renewed for a Pay Monthly contract before October 2021 then this will be free, and if you've joined or renewed for a Pay Monthly contract more recently then you'd have a daily roaming charge of £2 per day to unlock your allowance in Europe. Here's info on using your line in Spain, and the fair usage policies for Go Roam.
We won't be able to find out your contract dates from the community as this is a public forum, but you should be able to find more info about your plan in My3, or by contacting customer services.
Hope this helps,
JonathanB
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