OK, I have added this to my code:
<% BodyString=msg.Body %>
<% response.write "Auction number placement: = "%>
<% =InStr(BodyString," no.")+3 %>
<% response.write "<br><br>Actual auction number = "%>
<% =Mid(BodyString,83,9) %>
Edited as follows:
<% BodyString=msg.Body %>
<% response.write "Auction number placement: = "%>
<% =InStr(BodyString," no.")+5 %>
<% response.write "<br><br>Actual auction number = "%>
<% =Mid(BodyString,InStr(BodyString," no.")+5,7) %>
Which extracts the 7 didget auction number, but there is one thing wrong. I need the number in red to be dynamic, as the text in the email won't always be the same length, so I can't just set it to 83. Fixed it by adding the bit in red to replace the static number, works a treat!