ˌɔn fˈɪftiːn sɛptˈɛmbɚ tˈuː θˈaʊzənd twˈɛnti tˈuː, wˌaɪlst tˈeɪkɪŋ pˈɑːɹt wɪð twˈɛnti fˈaɪv ˈʌðɚ pɹˈɑːsteɪt kˈʌmɹi tʃˈæɹᵻɾi wˈɔːkɚz, ɪŋklˈuːdɪŋ hɪz dˈɔːɾɚ nˈɛl, ɔnðɪ ˈɪŋkə tɹˈeɪl tɹˈɛk tə mˈætʃuː pˈɪkuː, pɚɹˈuː, bˈʌtlɚ dˈaɪd pˈiːsfəli ɪn hɪz slˈiːp æɾ ˈɛkɔɪŋkə bˈeɪs kˈæmp nˌɪɹ kˈʌskoʊ ɪnðɪ ˈændiːz.
On 15 September 2022, whilst taking part with 25 other Prostate Cymru charity walkers, including his daughter Nell, on the Inca Trail Trek to Machu Picchu, Peru, Butler died peacefully in his sleep at Ecoinka base camp near Cusco in the Andes.