Matt from their web site "Monteiths Summer Ale is a bright gold beer with great body from four different malts. Spiced with a single hop variety and a touch of history a little Rata honey. Subtle, but enough to make all the difference. The result is a truly refreshing herbal spiced beer brewed for the Summer Season a splendid thirst quencher" and "Monteiths Summer Ale has an Original Gravity (OG) of 1048 alcohol of 5.0% and a final gravity of 1009+. This combination provides a smoothness from the combination of specialty malts and rata honey.."
Four Malts? Pilsner as a base, light crystal for colour and flavour, wheat? cara amber or light Munich
Hop, it would have to be an Nz (I dont think I have tasted this beer so I cannot comment) any one? Nelson Sauvin?
Mash low 62c ish
Yeast would be larger yeast I assume
I am sure one of the more experienced brewers will have some input.
Bump it up the to do list, we probably have the majority of ingredients