Romy Madley Croft

a lot of the reverb on the lead guitar is from a Roland Microcube, which I think they still use and is like a £100 amp

In a studio photo shared on Instagram by Romy Madley Croft, a Boss RV-5 Digital Reverb pedal is visible. The image dates back to around 2012 or 2013, demonstrating her use of this reverb effects pedal.

Romy can be seen here playing on a Gibson Les Paul. You can tell by the coulour of the hardware and body. The gold line around the sides is also an indicator. Also, the Gibson logo is briefly seen on the headstock.

In this photo, Croft is seen with Epiphone Les Paul Traditional Pro Goldtop guitar.

She almost always uses a Gibson ES-Les Paul, these are identified by their ivory coloured tuning keys and cream pickup rings and pickguard.

In This Video Of "The Xx" Playing "Hold On" On Saturday Night Live. You Can See Romy Using A Fender Mustang.

You can see Roland Cube 60 at minute 23:14. Romy has used this amplifier since xx album in 2009.

the lead guitar sound that ended up on the record really — a Boss DD3 delay pedal and the digital reverb setting on the Microcube

"Romy used an Epiphone Les Paul and a Gibson 335..."

0:57 You can see it. Romy use this pedal since february, 2017

In an Instagram post by Romy Madley Croft, a Boss TU-3 Chromatic Tuner is visible in the studio, indicating its use during a recording session.