Tweak volunteer handbook contact info section

templates/volunteer/info/index.md

@@ -38,27 +38,25 @@ If you have any queries about volunteering (or issues during a shift) you can ge
 <!-- TODO: Move these somewhere else -->
 # Important numbers
 
-From external phones (tbc):  
+The festival runs an internal phone system - [this guide explains the types of phone it works with and how to use it](/about/phones) if you bring one with you. The [internal directory](https://phones.emfcamp.org) covers most numbers but you should also receive a contacts sticker as part of your training.
 
-<dl class="dl-horizontal">
-  <dt>EMERGENCY <br />First Aid</dt><dd>01908 870909</dd>
-  <dt>First aid Tent</dt><dd>01908 870908</dd>
-  <dt>Site manager</dt><dd>01908 870904</dd>
-  <dt>Conduct</dt><dd>01908 870912</dd>
-</dl>
-
-Internal to EMF phone system: 
+Please avoid contacting HQ or the duty Site Manager except for [genuine emergencies](/volunteer/info/emergency) (e.g. fire where fire shouldn't be) where a member of staff or other team isn't available to help.
 
 <dl class="dl-horizontal">
+  <dt>Volunteer desk</dt><dd>1009</dd>
   <dt>Infodesk <br />(switchboard)</dt><dd>1001</dd>
-  <dt>Logistics</dt><dd>1030</dd>
-  <dt>Site Manager</dt><dd>1004</dd>
-  <dt>Creche</dt><dd>1040</dd>
+  <dt>Conduct</dt><dd>1234</dd>
   <dt>First Aid Tent</dt><dd>1090</dd>
   <dt>EMERGENCY <br />First Aid</dt><dd>1099</dd>
+  <dt>Site Manager</dt><dd>1010</dd>
   <dt>HQ</dt><dd>1011</dd>
-  <dt>Conduct</dt><dd>1234</dd>
-  <dt>Volunteer desk</dt><dd>1009</dd>
+</dl>
+
+If you're just using your usual mobile and SIM card, you'll only be able to call external numbers and you may find reception poor. Smart phones with WiFi calling may get better coverage that way. The on-site team will be able to get emergency help to someone more quickly than by calling 999.
+
+<dl class="dl-horizontal">
+  <dt>Conduct</dt><dd>0333 112 2944</dd>
+  <dt>Medical Emergency</dt><dd>(tbc)</dd>
 </dl>
 
 <a href="{{ url_for('base.page', page_name='volunteering') }}">About volunteering (orga-side)</a>