Used on "Hymn for the Weekend", as mentioned by A Head Full of Dreams co-producer Rik Simpson in this Sound on Sound article.

It was very important to get the development and arrangement of the vocals right. Many of the 45 tracks are effect tracks. There’s only one lead vocal track each for the verses [LV Verse], for the bridge [LV Bridge], and the choruses [LV Chorus], and then Chris sang a number of bridge and chorus vocal overdubs. The main verse vocal has the Avid Channel Strip, which is taking out some low end, an SPL TwinTube, which adds some saturation, the UBK1 compressor adding more crunch, and the UAD Fairchild 670 and SSL E Channel. I don’t use a great deal of compression from each unit. I will just tickle it a little bit with each one, and each one adds a different characteristic. I could just add a whole load of compression from one plug–in, but like this it doesn’t sound over–compressed. The Pro–Q 2 is, again, a high–pass filter. In the sends there’s a Waves H–Delay that I recorded elsewhere, and sends to a main D–Verb and two QL Spaces aux tracks. I have different reverbs and delays for each part of the song so that the vocal sound evolves during the song.

“The main chorus lead vocal has the FabFilter Pro–Q 2 EQ, the Waves Rennaissance Vox, again the UBK1, two instances of the FabFilter Pro–DS de–esser, two instances of the UAD Pultec EQP–1A, and the FabFilter Pro–MB multi–band compressor. I like the FabFilter de–esser. I am still trying to find the ultimate de–esser, because it’s quite a hard thing to do right. I have two because one is doing high top sibilance, and the other lower stuff around 2kHz. The sends on chorus lead vocal go to aux tracks with the Waves H–Delay, the FXpansion Bloom with a lush, wide stereo delay, a small chamber from the QL Spaces plug–in, a mono delay from the UAD Echoplex, and several other delays. The sends to the delays are all automated independently, with different words getting different delays.

“One thing of note is that there also is a ‘Hope House M80’ vocal track, recorded when Chris was still using the Telefunken M80, and it’s mixed in very low. There’s also a lead-vocal double that has ‘251’ marked, indicating that Chris was also using that mic. But the main vocals were recorded using the Soyuz. There are two tracks marked ‘251 Melo Lead’ and ‘251 Melo Double’, again mixed in low. ‘Melo’ stands for Melodyne, and these tracks are raised two semitones. They were recorded in a different key for a different version of the song, and detuning them added a certain alien quality to these vocals which we really liked. At the bottom of the session are the Beyoncé vocal tracks, on which I mainly used the SSL E Channel strip, UBK1, L2, SoundToys Echo Boy, Avid ModDelay and the QL Space.”

In this video Ben shows his processing on a conch shell sample which is a big part of the track VALE. You can see the SPL Twin tube in ABLETON LIVE being used to add some saturation.

In the YouTube video titled "[ARCHIVED] Top 10 Must Have VST Plugins For Producers," Jonas Aden demonstrates the usage of the SPL TwinTube plugin at the 7:50 mark, where he explains its application in his music production process.

The main verse vocal has the Avid Channel Strip, which is taking out some low end, an SPL TwinTube, which adds some saturation, the UBK1 compressor adding more crunch, and the UAD Fairchild 670 and SSL E Channel.

at 24:59 you see that he is using the SPL TwinTube

At 4:32, he shows us the twin tube uad plugin

SPL Twintube can be seen onscreen via a photo on Dana James Presson’s Instagram.

In an interview with AudioTechnology, music producer and audio engineer Mark “Spike” Stent confirmed using the SPL TwinTube.

A plug-in that I really like.