Add to Cart = 10 seconds?

Hi all,

site is https://www.redgateopticians.com

problem is simply a very slow add to cart load.

I can go from cart to checkout quickly, but there is something wrong with the cart page, and I cant figure it out. Any ideas?

I have a few sites on this same server, and they seem fine.

report :

### WordPress Environment ###

Home URL: https://www.redgateopticians.com
Site URL: https://www.redgateopticians.com
WC Version: 3.0.8
Log Directory Writable: ?
WP Version: 4.8
WP Multisite: –
WP Memory Limit: 320 MB
WP Debug Mode: –
WP Cron: ?
Language: en_GB

### Server Environment ###

Server Info: Apache
PHP Version: 5.6.98-servage1
PHP Post Max Size: 8 MB
PHP Time Limit: 40
PHP Max Input Vars: 1000
cURL Version: 7.26.0
OpenSSL/1.0.1j

SUHOSIN Installed: –
Max Upload Size: 8 MB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ?

### Database ###

WC Database Version: 3.0.8
WC Database Prefix: rg_
woocommerce_sessions: ?
woocommerce_api_keys: ?
woocommerce_attribute_taxonomies: ?
woocommerce_downloadable_product_permissions: ?
woocommerce_order_items: ?
woocommerce_order_itemmeta: ?
woocommerce_tax_rates: ?
woocommerce_tax_rate_locations: ?
woocommerce_shipping_zones: ?
woocommerce_shipping_zone_locations: ?
woocommerce_shipping_zone_methods: ?
woocommerce_payment_tokens: ?
woocommerce_payment_tokenmeta: ?

### Security ###

Secure connection (HTTPS): ?
Hide errors from visitors: ?

### Active Plugins (15) ###

Akismet Anti-Spam: by Automattic – 3.3.2
BirchPress Scheduler Business: by BirchPress – 2.9.30.B
Cookie Notice: by dFactory – 1.2.38
Jetpack by WordPress.com: by Automattic – 5.0
MailPoet WooCommerce Add-on: by Sébastien Dumont – 3.0.2
Theme My Login: by Jeff Farthing – 6.4.9
UpdraftPlus - Backup/Restore: by UpdraftPlus.Com
DavidAnderson – 1.13.4

W3 Total Cache: by Frederick Townes – 0.9.5.4
WooCommerce Checkout Add-Ons: by SkyVerge – 1.10.4
WooCommerce Stripe Gateway: by WooCommerce – 3.1.9
WooCommerce Subscriptions: by Prospress Inc. – 2.2.7
WooCommerce: by Automattic – 3.0.8
Yoast SEO: by Team Yoast – 4.9
WP Smush: by WPMU DEV – 2.7.1
MailPoet Newsletters: by MailPoet – 2.7.10

### Settings ###

API Enabled: ?
Force SSL: ?
Currency: GBP (￡)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
subscription (subscription)
variable (variable)
variable subscription (variable-subscription)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

### WC Pages ###

Shop base: #53 - /rg-catalogue/
Basket: #5 - /cart/
Checkout: #6 - /checkout/
My account: #7 - /cmy-account/

### Theme ###

Name: Redgate
Version: 1.0.0
Author URL: 
Child Theme: ?
Parent Theme Name: Divi
Parent Theme Version: 3.0.47
Parent Theme Author URL: https://www.elegantthemes.com
WooCommerce Support: ?

### Templates ###

Overrides: –

### subscriptions ###

WCS_DEBUG: ? No
Subscriptions Mode: ? Live