Here is a list of FM stations available in Southborough on 24th August, 2019.
Included are French stations audible due to unusual atmospheric conditions with the 400kW transmitter at Lille in NE France consistently strong.

CR = Low Power Community Radio station
X = Very weak signal
XXX =  Very strong signal
– = Audible only under certain conditions

Iow = from Isle of Wight

88.1 88.5 88.7 89.1 89.4 89.7 90.0	R2 Guildford R2 Rowridge IoW Fra Musique, Lille R2 Wrotham Fra Mus, Boulougne R2 Norfolk R2 Dover	X X – XXX – – X
90.3 90.7 91.3 91.9 92.1 92.4	R3 Guildford R3 Rowridge IoW R3 Wrotham R3 Norfolk Vacant R3 Dover	X X XXX – – X
92.5 92.7 92.9 93.5 94.1 94.2 94.4	R4 Guildford Fre Rap, Boulogne R4 Rowridge IoW R4 Wrotham R4 Norfolk TF Live (Electronic) R4 Dover	X – X XXX – XX X
94.7 94.9 95.3 95.5 95.6 95.8	France Bleu, Lille BBC R London BBC Essex (South) Fra Bleu, Boulogne CR: Isle of Sheppey Capital R Croydon	– XX XX – X XX
96.2 96.7 97.3 97.5	KMFM Pembury BBC R Kent Wro LBC Croydon Heart Horsham	XXX XXX XX X
97.7 98.0 98.1 98.8 99.3 99.5 99.9	R1 Guildford Fra Culture, Lille R1 Rowridge IoW R1 Wrotham R1 Norfolk R1 Dover Fra Culture, Boulg	X – X XXX – X –

100.0 100.2 100.4 100.9 101.6 101.8	Kiss Croydon Dream 100 Essex KMFM Gillingham Classic Wrotham KMFM Wrotham Classic FM Dover	X X X XXX XXX X
102.2 102.4 102.7 103.1 103.3	Smooth Croydon Heart Heathfield Heart Reigate Heart Maidstone Fra Inter, Boulogne	X XXX XXX XXX –
103.5 103.7 103.7 103.9 104.0 104.2 104.5 104.9	BBC Essex(North) France Inter, Lille Funky Esx Southend Europe 1, Boulogne BBC Surrey R’gte BBC R Kent Dover BBC Sussex H’fld Radio X, C Palace	XX – X – XXX X XXX XX
105.1 105.2 105.4 105.6 105.8 106.0 106.2	Essex R Southend France Info, Lille Magic Croydon KMFM Maidstone Absolute C Palace KMFM Canterbury Heart Croydon	XX – XX X XX X XX
106.5 106.7 107.0 107.3 107.6 107.9	Fra Info, Boulogne Vacant CR: East Grinstead Vacant KMFM Ashford KMFM Hoo	– – – – X X