If you go by the lat and long, than you come to a location close to the A3 near by Milford, which is situated about 6 miles sout west of Guildford and 18 miles west of Gatwick. So I my guess would be that the a/c is outbound from Gatwick. And if the a/c was on a standard departure (SAM 2M), a/c's altitude would probably be around 4000/5000' depending on the climb clearance.
Cheerio