HertogJan: In The Netherlands the provider Ben offers subscriptions combined with a Wileyfox phone. You might be lucky and find a small local provider offering 1. As Wileyfox is British, you might ask them if they know.
Some phones offer a dual sim where the 2nd sim slot is either used for a 2nd sim or for an SD card.
I only know the Swift (not Swift 2) which can use an SD card of up to 32 GB for internal memory or even bigger cards for external memory.
You can get the older ones, the original Swift and Spark on contracts (very cheaply), just not the new ones. Maybe if I give it a few more months they might turn up.
Yeah, annoyingly it would actually be helpful to have both a second sim and an SD Card (and then I wouldn't need a separate business mobile) but with second sim phones it seems to be one or the other (and the SD Card is more important to me).
Matruchus: Well the Swift only allows you to insert a micro sdcard but why is that a problem? You can just transfer the data through explorer via cable to sd card. I mean a level 10
32GB micro sd card costs only 9.99 pounds nowadays. But yeah you need to remove the back cover to get to the sd card + remove the battery to get it out if you wan't to use it elsewhere. That is for my Wileyfox Swift - I'am not sure if its the same in the new Swift 2 range.
It's not a problem, the Swift (and all Wileyfox phones I think) accept SD cards. It's most other phones that don't seem to any more.
I'd buy a Nexus or other Google brand phone, but they don't accept SD cards and have pitiful internal memory (because they want you to use the cloud). I don't think many Sony ones do any more either (though I can't be sure, and there are so many different Sony phones I can't be bothered to compare them and find which one might suit me)