Shortly after finishing the viva, Rosalind presented Tom with his PhD hat. This is a tradition Luc stole from his time in Switzerland: the new most senior PhD candidate makes a hat to honour the achievement of the labs most recently fledged member

Close-up of hat to reveal the details: the balloons represent a spermatophylax nuptial gift transferred from males to females during courtship.

Tom posing with Lilly (left) and Rosalind shortly after passing his viva.

Post-viva celebrations at the Tappit Hen in Dunblane. tom is accompanied by his wife Kirsty on his right, and his external examiner, Dr. Alexei Maklakov