No they weren't, while variable rates in general would increase or decrease in line with ECB they did not have to go up or down by the exact amount of the ECB move unlike a tracker which could only change by the amount of the ECB change. Ordinary variable rate changes were at the bank's discretion.
A tracker mortgage is one which is guaranteed in the contract to rise and fall exactly in line with ECB rate. It does not matter which bank issued it. If this is not in the contract, then it is not a tracker mortgage. End of story.
As Monbretia pointed, most lenders raised and reduced interest rates in line with the ECB rates, but that does not make them tracker mortgages. And this can be seen clearly when the lenders started pushing up mortgage rates while ECB rates were declining.