peeteechase,
a go around may be no problem for you but at LHR its no picnic for the controllers involved I can assure you-especially in LVP's; if you don't believe me there is a very nasty airprox report (the airprox was nasty not the report-u know what I mean) from about 5 years ago(ATCO2 may be able to be more precise) from an a/c going around in fog-miss distance as I recall was in the order of 100ft no sighting.