New site not showing

Have seen similar posts but not found solution yet. Have moved to new WP-friendly hosting (tsohost) and done a clean install into root (/public_html). Installed MU using Subdirectory. No Plugins. Added 2nd site.

Can see both sites (rdellwebworks.co.uk [Base Site] and rdellwebworks.co.uk/scmtc-test/ [Test Sandbox]).

Network Admin Dashboard/Sites is showing 2 sites (/ ; /scmtc-test/).

Problem: My Sites drop-down only showing Network Admin & Base Site.

.htaccess – code compared with original,
– tried with/without:
Options FollowSymlinks
– tried with:
/ ; /public_html ; /public_html/ ;

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(wp-(content|admin|includes).*) $1 [L]
RewriteRule  ^[_0-9a-zA-Z-]+/(.*\.php)$ $1 [L]
RewriteRule . index.php [L]

wp-config:

/* Multisite */
define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', false);
$base = '/';
define('DOMAIN_CURRENT_SITE', 'rdellwebworks.co.uk');
define('PATH_CURRENT_SITE', '/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);

Any help appreciated!