Back garden double wall

Looks like a picture straight out a gardening 'how to' book, amazing.! Looks like a very established garden, how long have the vines been growing in the background ?

Thanks! There's a Clematis montana on the logshed to the right, straight ahead on the trellis are two intermingled Honeysuckles and there is a vine but not in view. There's a Pergola out of shot to the left with a 'Kiftsgate' rose and a vine on it. Most of this was planted by the previous owners of the house who lived here for about 20 years - we've been here just over 3.