The Essendon bellringers’ millennium window was dedicated by the Bishop of St Albans on 5 October 2003, with the new parish room. The window was designed and made by local stained glass artist, Tessa Verrecchia.

Tessa is one of a few English artists helping to revive the fused glass technique, neglected since Roman times, of firing pieces of glass overlapping each other to liquid point so that the colours and shapes are incorporated into a single pane of glass with fascinating tints and textures.

At the very top, the centre pane of the window depicts Essendon's famous churchyard cedar tree, a Cedar of Lebanon. At the top of the centre piece of the window are two angels robed in red and yellow with their wings outstretched behind them. Their touching hands hold two handbells, representing the 26 handbells we use for tune ringing. Under the angels is the belfry showing the eight bells with their dates of casting, ranging from 1681 to 1990.

Either side of the main panel are representations of the sun that shines on bellringing. The vibrant colours and swirling shapes and patterns evoke the polyphonic tones of bells ascending to heaven. The inscriptions above each of the three upper windows together read "and our mouths shall show forth thy praise" - mouth, in this instance, referring to the bell mouth.

Under these panels are the words ‘Essendon Bell Ringing’ below which is another wonderful sun. The green panel under this sun depicts the village from Holwell Lane.

The last section comprises the year 2000 in the centre denoting the celebratory year, and on either side, etched into the glass in black, is the blue line for Essendon Surprise Major.