Thanks for your responses
As you stay long enough in the UK to visit relatives then these costs were not wholly and exclusively expenditure that arises for the house and carrying out maintenance.
Furthermore HMRC will question why you did not use the managing agent to get a tradesman in - as I assume they are there to manage the rental month by month in your absence, and you pay them to do this so this is further cost that you have already incurred and for this reason along with the fact you visit relatives whilst here - I am afraid HMRC will not accept any element of the claim to date.
I should also advsie getting this property ready for rental is not an allowable cost as you can only claim for costs incurred once you have tenants in place (so genuine maintenance and repairs)
You did not advsie furtehr how come you paid out rental costs but as this is not a valid claim then how or why those costs arose are I am afraid also not even to be considered.
Same with costs to and from airports or car or van hire. HMRC will just view this as funding a holiday which I am sure you can appreciate.
Costs for the repairs and the costs to and from where you stay in the Uk to the rental property would be allowed.
I am sorry the news is not more favourable.
For future claims - you would have to either ask the managing agent to oversee the repairs OR make sure trips to the UK were solely for the repairs or maintenance and those costs can only be allowable when you have tenants living in the properties and you are collecting the rents.
Then you could have the costs to and from the UK and costs whilst here