Thank you for your help. I tried again with v5.2 and got the same result. Yes that is correct I am not using addons. Would that help? There is no way to delete in batches as far as I can see.
### Begin System Info ###
## Please include this information when posting support requests ##
WordPress Memory Limit: 64M
PHP Safe Mode: No
PHP Memory Limit: 256M
PHP Upload Max Size: 7M
PHP Post Max Size: 7M
PHP Upload Max Filesize: 7M
PHP Time Limit: 30
PHP Max Input Vars: 1000
PHP Arg Separator: &
PHP Allow URL File Open: Yes
WP_DEBUG: Disabled
EMPTY_TRASH_DAYS: 30
WP Table Prefix: Length: 10 Status: Acceptable
Session: Enabled
Session Name: PHPSESSID
Cookie Path: /
Save Path: /tmp
Use Cookies: On
Use Only Cookies: On
DISPLAY ERRORS: On (1)
FSOCKOPEN: Your server supports fsockopen.
cURL: Your server supports cURL.
SOAP Client: Your server has the SOAP Client enabled.
SUHOSIN: Your server does not have SUHOSIN installed.
ACTIVE PLUGINS:
Bulk Delete: 5.2
Contact Form 7: 3.8.1
EWWW Image Optimizer: 1.4.3
Google Analytics for WordPress: 4.3.3
Magic Action Box Pro: 2.11
Page Link Manager: 1.0b
WordPress Social Login: 2.1.3
### End System Info ###