altering the duration of individual testimonials on the widget

There is no option for that, you have to change the setting in testimonials.php. Find this function:

function gct_widget_code() {
	$output = '<script type="text/javascript">jQuery(document).ready(function($) { $("#tcycle").cycle({ fx: "fade", speed: 1500, timeout: 8000, pause: 1}); });</script>';
	echo $output;
}

and change the timeout value. (1000 = 1 sec.)

thanks for that. I did find that and experimented with different values but it still seems to be stuck at around the 4000ms mark.

I tried clearing my cache but no luck in that changing. the value is currently set to 16000. do you fancy visiting https://www.allpestservices.co.uk and looking at the testimonials near the footer to see if you can see the same as me?

Cheers

Colin

That does not appear to be the GC Testimonials widget but rather a slideshow using Slides, a jQuery plugin. Those settings would be in another WordPress plugin or your theme.