Inserting a hyperlink to a printed PDF

I can currently print a series of instructions for a colleague using the following as a formula in a table:

if 'Bus Stops'.Operator != "WALK" then
"catch the route " + 'Diagram Strata Information'.Routes.'Route Name' + " , " + 'Diagram Strata Information'.Operator + " service from " + 'Bus Stops'.ShortCommonName_en + " (Platecode " + 'Bus Stops'.PlateCode + ") to " + 'Bus Stops2'.ShortCommonName_en + " (Platecode " + 'Bus Stops2'.PlateCode + "), arriving at " + Arrive + ". Duration: " + 'Study Time'
else
"walk to " + 'Bus Stops2'.ShortCommonName_en + " (Platecode " + 'Bus Stops2'.PlateCode + "), arriving by " + Arrive
end

However where i have the following displaying as text in the pdf - " (Platecode " + 'Bus Stops'.PlateCode + ") - I would like to display this as a hyperlink from the PDF using the URL in  a field called 'Start URL' - does anyone know how I can get the text into a hyperlink so when they click on it it brings up the URL in 'Start URL' ? Thanks in advance