咱们来拆解你遇到的核心问题：mod_alias的redirect指令是前缀匹配，加上WP内置的旧slug重定向机制，两者叠加导致了无限循环。结合你的配置和场景，我给你一步步的解决方案：

1. 修复.htaccess中的重定向规则（关键！） #

你当前使用的Apache redirect指令属于mod_alias模块，它是前缀匹配而非精确匹配。比如你写的redirect 301 /blog /cycling-blog，会把所有以/blog开头的URL（包括你的文章URL/blog/cycling-beginners-guide...）都重定向到/cycling-blog/[后缀]，而这些后缀页面不存在时，WP的内置重定向会试图把它转回到原来的/blog/[后缀]，形成循环。

替换方案：改用精确匹配的RedirectMatch规则 #

把所有redirect指令替换为精确匹配的规则，放在# BEGIN WordPress之前，确保只重定向你指定的单个页面/目录，不影响子路径：

# 精确匹配单个页面/目录的301重定向
RedirectMatch 301 ^/routes/gloucestershire-route/cheltenham-hillclimb-blitz-two-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/gloucester-follow-severn-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/gloucester-steady-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/gloucestershire-campus-tour-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/lechlade-cotswolds-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/stroud-airfield-loop-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/stroud-cycle-circuit-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/stroud-newport-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/forest-dean-newent-woods-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/forest-dean-st-bravels-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/cirencester-oxford-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/cirencester-evesham-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/cirencester-countryside-loop-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/chipping-campden-bourton-water-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/cheltenham-malvern-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/routes/gloucestershire-route/cheltenham-bourton-water-cycling-route$ /gloucestershire-cycling-routes
RedirectMatch 301 ^/features/what-are-trail-dogs-and-adventure-dogs$ /cycling-blog
RedirectMatch 301 ^/shropshire$ /shropshire-hub
RedirectMatch 301 ^/south-wales$ /south-wales-hub
RedirectMatch 301 ^/gloucestershire$ /gloucestershire-hub
# 只精确匹配根目录下的/blog，不影响/blog/开头的文章URL
RedirectMatch 301 ^/blog$ /cycling-blog

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
# BEGIN WP-HUMMINGBIRD-GZIP
# END WP-HUMMINGBIRD-GZIP
# BEGIN WP-HUMMINGBIRD-CACHING
# END WP-HUMMINGBIRD-CACHING

2. 禁用WordPress内置的旧Slug重定向 #

WP默认会记住文章/分类的旧slug，自动触发301重定向，这也是循环的诱因之一。你可以通过以下方式禁用它：

• 打开主题的functions.php文件，添加以下代码：

remove_action('template_redirect', 'wp_old_slug_redirect');

• 或者使用代码片段插件（比如Code Snippets）添加这段代码，避免主题更新后代码丢失。

3. 清除缓存（必做！） #

301重定向会被浏览器、服务器强烈缓存，所以你需要：

• 清除浏览器缓存和Cookie，或者用无痕模式测试
• 在WP后台清除Hummingbird插件的缓存
• 联系主机提供商清除服务器端缓存（如果有配置的话）

4. 验证HTTPS配置 #

确保WP的HTTPS配置正确，打开wp-config.php文件，确认以下两行存在：

define('WP_SITEURL', 'https://cyced.co.uk');
define('WP_HOME', 'https://cyced.co.uk');

避免HTTP与HTTPS之间的隐形重定向循环。

内容的提问来源于stack exchange，提问作者Ben King