ERA Double Locking Nightlatch

This is a brand new product that we bought but never used. As can be seen in the photos, it is still in the original packaging.
This item in chrome is currently for sale on Amazon for £55.53

"Era British made quality front door lock in polished brass effect
The Double Locking Nightlatch is designed to replace most existing front door locks
The main lock bolt is deadlocked when door closed, to prevent being retracted by credit card
The bolt can be held in the withdrawn position (only) with the use of the snib feature. Inside handle can be deadlocked by key from the inside so securing the lock against forced entry
This product is ideal for solid and glass panelled doors." Read more