Trosol was established in 1985, primarily as a subtitling company. Over time, the company has diversified and is now Wales’ leading provider of written translation, simultaneous translation, subtitling and other language services. Trosol became part of BTI Studios in April 2013. 

Over the past 30 years we have forged a formidable reputation for the consistently high quality of our work. Though our work is mainly based in the public sector, we also service a burgeoning market for Welsh language services in the private sector. Our list of clients includes S4C, NHS Wales and OCR and Edexcel examination boards. 

BTI Studios in Wales


Rhodri Evans
Managing Director

1 Cwrt-y-Parc, Parc Tŷ Glas
Cardiff, CF14 5GH

T: +44 (0)2920 750760