diff --git a/README.md b/README.md
index 1b156d0..cd5bfdd 100644
--- a/README.md
+++ b/README.md
@@ -1,16 +1,20 @@
-# Xero API
+# Xero API Client
 
-API package for Xero authenticated access, PSR-7, PSR-15, PSR-18.
+API package for Xero authenticated access.
+Leverages PSR-7, PSR-17 and PSR-18.
 
 Handles the OAuth 1.0a requests, and token renewals for the *partner application*.
-It does this by offering a decorated PSR-18 
+It does this by offering a decorated PSR-18 client.
+
+Provides support for the authentication flow to capture the OAuth 1.0a tokens.
 
 Features include:
 
 * Support for *Partner Application* only at present.
-* Automatic token renewal by time (including guard time) or on an expired token.
-* Callback to the application for persistence of the OAuth1 token credentails
-  when they gety renewed.
+* Automatic token renewal of a token by its local age, or on an expiry flagged by
+  the remote Xero API.
+* Hook to the application for persistence of the OAuth1 token credentails
+  when they get renewed. This keeps the burden of renewals away from the application.
 
 ## Simple Usage
 
diff --git a/src/Oauth1/Authorise.php b/src/Oauth1/Authorise.php
index 135f8bc..033a6f8 100644
--- a/src/Oauth1/Authorise.php
+++ b/src/Oauth1/Authorise.php
@@ -54,13 +54,6 @@ public function getTemporaryToken()
             'oauth_callback' => $this->getConfigItem('callback_uri'),
         ];
 
-        if ($this->getConfigItem('redirect_on_error')) {
-            // This should force a cancel to come back to the consumer
-            // site, but I'm not sure it is working.
-
-            $queryParameters['redirectOnError'] = 'true';
-        }
-
         // Construct URI.
 
         $oauth1Endpoint = $this->getOauth1Endpoint();
@@ -105,6 +98,13 @@ public function authoriseUrl(OauthTokenInterface $temporaryToken)
             $queryParameters['oauth_token'] = $oauthToken;
         }
 
+        if ($this->getConfigItem('redirect_on_error')) {
+            // This should force a cancel to come back to the consumer
+            // site, but I'm not sure it is working.
+
+            $queryParameters['redirectOnError'] = 'true';
+        }
+
         $oauth1Endpoint = $this->getOauth1Endpoint();
 
         $redirectUserUri = $oauth1Endpoint->getRedirectUserUri()
diff --git a/src/Oauth1/Token.php b/src/Oauth1/Token.php
index e67aff1..644422a 100644
--- a/src/Oauth1/Token.php
+++ b/src/Oauth1/Token.php
@@ -402,6 +402,16 @@ public function withOauthProblem(string $oauthProblem): self
         return (clone $this)->setOauthProblem($oauthProblem);
     }
 
+    /**
+     * Undocumented, some results come back with an "error"
+     * GET parameter. Map them onto an OAuth error.
+     */
+    public function setError(string $error): self
+    {
+        $this->oauthProblem = $error;
+        return $this;
+    }
+
     /**
      * Get/set/with OAuth reason.
      */
@@ -424,6 +434,16 @@ public function withOauthProblemAdvice(string $oauthProblemAdvice): self
         return (clone $this)->setOauthProblemAdvice($oauthProblemAdvice);
     }
 
+    /**
+     * Undocumented, some results come back with an "error_description"
+     * GET parameter. Map them onto an OAuth error.
+     */
+    public function setErrorDescription(string $errorDescription): self
+    {
+        $this->oauthProblemAdvice = $errorDescription;
+        return $this;
+    }
+
     /**
      * @return bool true if the object contains an OAuth error
      */