Hi derrynoose,
Make sure you choose a fertiliser specificly for autumn use such as 'Levington autumn extra lawn food' which is a weed and feed treatment. it should contain: Ferrous sulphate to kill moss and also plant nutrients, NPK
Nitrogen (N)
Phosforus (P)
Potasium (K)
7% of each.
Be sure not to exeed the stated coverage.
You may later wish to top dress your lawn after it's been spiked. The ratio will vary depending on the nature of you soil ei- heavy clay- 1 part peat, 2 parts loam, 4 parts sand.
Loamy soil- 1 part peat 4 parts loam 2 parts sand.
Light sandy soil- 2 parts peat, 4 parts loam, 1 part sand.
PS use only hoticultral sand that is lime free.
This should have it looking great next spring! Good Luck. Tbird+