Winger Rocco Vata has sent a goodbye message to Celtic on Instagram after confirming his switch to English Championship side Watford. Vata made his debut back in December of 2022 under former manager Ange Postecoglou but speculation about his long-term Celtic future endured in the months and years after. Hopes were initially high that he could be the latest Academy talent to bridge the gap to the senior squad consistently but he ended up making just six substitute appearances. Despite contract offers, the Republic of Ireland youth international didn’t commit to the Bhoys and his deal expired a…