I don't know how long this has been on their web site, but I just noticed that Toggle now offers "data plans for home & roaming customers". You get 1 GB for £20, 2GB for £30 or 3 GB for £40. Once you've activated the plan you can use data in any Toggle country.

There's a big gotcha though: "The Data Plan is automatically renewed on expiry." So if you're using it while on vacation and forget to cancel at the end of 30 days, you're going to see your account's credit drain away in a hurry.

This is a big discount from their standard rate of £0.15/MB. They still offer UK-only bundles at £5, £7.50 or £10 for 500MB, 1GB and 2GB respectively. These bundles also auto-renew.

Current Toggle countries: Australia, Denmark, France, Germany, Ireland, the Netherlands, Norway, Poland, Spain, Switzerland, Sweden, the UK or the USA.