Glad it all worked out gnubbit, I often find the friendly approach works best for everyone!
for those of you who are quoting the act etc, these are minimum requirements, there is nothing stopping anyone agreeing to or landlords requesting that tenants allow viewings etc take place, and as I already said the majority of lease agreements would have a clause which specifically allow for the landlord or agent to view with potential new tenants, always check before you sign anything,